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Effort to Reverse Engineer WebSDR @ Twente

Trying to figure out how to capture the audio from the WebSDR @ Twente.

http://websdr.ewi.utwente.nl:8901

Mirror the websdr site

wget --mirror http://websdr.ewi.utwente.nl:8901

Current Efforts

The ruby script will successfully pull down the audio IQ, however the IQ cannot be played in Audacity. I believe this is because the audio is encoded or otherwise slightly mangled to deter us.

To figure this out, I am deobfuscating the websdr-sound.js that handles the data coming in from the WebSocket from the server to see what they are doing to be able to play it with HTML5's AudioContext.

I have also decompiled the Java Applet version of the sound player websdrsound.class that is optionally used if the user's browser cannot do HTML5 Audio.

require 'faye/websocket'
require 'eventmachine'
frequency = "1010"
band = "0"
EM.run {
output = nil
ws = Faye::WebSocket::Client.new('ws://websdr.ewi.utwente.nl:8901/~~stream?v=11', [], headers: {
'Connection' => 'Upgrade',
'Host' => 'websdr.ewi.utwente.nl:8901',
'Origin' => 'http://websdr.ewi.utwente.nl:8901',
'Cookie' => 'view=2; ID=5d83b2fd9c13',
'Pragma' => 'no-cache',
'Cache-Control' => 'no-cache',
'Sec-WebSocket-Key' => 'K+3pZ6WnO+JMDVF5CX4J+w==',
'Sec-WebSocket-Version' => '13',
'Sec-WebSocket-Extensions' => 'x-webkit-deflate-frame',
'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0 Safari/605.1.15'
})
ws.on :open do |event|
puts "WebSocket connected, sending params to set the tuner..."
pcm_output = File.open('pcm', 'wb')
ws.send("GET /~~param?f=#{frequency}&band=#{band}&lo=-4dd.5&hi=4.5&mode=1&name=")
end
ws.on :message do |event|
puts "Received #{event.data.size} bytes"
event.data.each do |byte|
pcm_output.print byte.chr
end
# p [:message, event.data]
end
ws.on :close do |event|
pcm_output.close
puts "Closed."
ws = nil
end
}
// Originally from http://websdr.ewi.utwente.nl:8901/websdr-sound.js
// Effort made to de-obfuscate
//WebSDR HTML5 client side - Copyright 2013-2020, [email protected] - all rights reserved
//Since the intended use of this code involves sending a copy to the client computer, I (PA3FWM) hereby allow making it available unmodified, via my original WebSDR server software, to original WebSDR clients. Other use, including distribution in part or entirety or as part of other software, or reverse engineering, is not allowed without my explicit prior permission.
(function () {
var h = null,
AudioContext = window.AudioContext || window.webkitAudioContext;
if (AudioContext) {
document.audioContext || (document.audioContext = new AudioContext());
var convolver;
try {
convolver = document.audioContext.createConvolver;
} catch (wa) {}
convolver || ((document.audioContext = h), (sup_webaudio = !1));
}
var F = 32768;
function za() {
function processEvent(audioProcessEvent) {
var channelData = audioProcessEvent.outputBuffer.getChannelData(0),
bufferIndex;
var timeDifference;
var bufferLength = audioProcessEvent.outputBuffer.length;
processStartTime = new Date().getTime();
if (ha || 2 <= P)
(ha = 0),
3 < P && (P = 0),
(channelData = p),
(timeDifference = processStartTime - wsMessageReceiveTime),
0 <= R && ((R = -1), (actualRemoteSampleRate *= remoteSampleRate / v), (v = remoteSampleRate)),
(p = qa + (timeDifference / 1e3) * remoteSampleRate - H * remoteSampleRate - (bufferLength * v) / audioSampleRate),
(p = Math.round(p)),
(p = (2 * F + p) % F);
200 < processStartTime - lastProcessTime && 0 < lastProcessTime && (ha = 1);
lastProcessTime = processStartTime;
for (bufferIndex = 0; bufferIndex < bufferLength; bufferIndex++) {
var d = 0,
f = (x * v) / audioSampleRate;
q += f;
1 <= q
? ((q -= 1),
(y[p] = 0),
p++,
p >= F && (p -= F),
p == R && ((R = -1), (actualRemoteSampleRate *= remoteSampleRate / v), (v = remoteSampleRate)),
p == g && (P = 1),
(d = q / f),
(d *= y[p]),
(d /= f))
: q < 2 * f && ((d = (2 * f - q) / f), (d *= y[p]), (d /= f));
muted && (d = 0);
channelData[bufferIndex] = 2e-5 * d * volume;
}
M += (1e3 * bufferLength) / actualAudioSampleRate;
processStartTime < M && (M = processStartTime);
V += bufferLength;
V >= audioSampleRate &&
((channelData = 1e3 * (V / (M - sa))),
channelData < 1.01 * audioSampleRate && channelData > 0.99 * audioSampleRate && (actualAudioSampleRate += (channelData - actualAudioSampleRate) / W),
(sa = M),
(V = 0),
(M = processStartTime));
}
document.getElementById("soundappletdiv").innerHTML =
'<div onclick="var e=document.getElementById(\'soundappletdebug\'); e.style.display=(e.style.display==\'none\')?\'block\':\'none\';" style="max-width:400px; min-height:50px; border-style:solid; border-color:black; background-color:white; color:black; border-width:1px; margin:2px; padding:2px; font-family:sans-serif; font-size:x-small;">WebSDR HTML5 sound - Copyright 2007-2020, P.T. de Boer, [email protected]<br><span id="soundappletdebug" style="display:none"></span></div><span id="debug2"></span>';
var y = new Int16Array(F),
g = 0,
p = 6144,
q = 0,
remoteSampleRate = 8e3,
v = 8e3,
R = -1,
actualRemoteSampleRate = 8e3,
audioSampleRate = 48e3,
actualAudioSampleRate = 48e3,
x = 1,
volume = 1,
ja = -1,
S,
A = 0,
B = [],
ka,
X,
Y = 0,
soundApplet = this,
webSocket = h,
ya = [
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],
playbackBuffer = [
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V = 0,
sa = 0,
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ha = 0,
currentAudioContext,
scriptProcessor,
currentConvolver,
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currentAudioContext.sampleRate = audioSampleRate;
var actualAudioSampleRate = (audioSampleRate = currentAudioContext.sampleRate),
na;
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} catch (Aa) {
scriptProcessor = currentAudioContext.createJavaScriptNode(na, 1, 1);
}
scriptProcessor.onaudioprocess = processEvent;
this.currentScriptProcessor = scriptProcessor;
currentConvolver = currentAudioContext.createConvolver();
scriptProcessor.connect(currentConvolver);
currentConvolver.connect(currentAudioContext.destination);
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(playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate)),
(channelDataChunk = playbackBuffer.getChannelData(0)),
channelDataChunk.set(J),
(K[0] = playbackBuffer),
(playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate)),
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channelDataChunk.set(J),
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(channelDataChunk = playbackBuffer.getChannelData(0)),
channelDataChunk.set(la),
(K[2] = playbackBuffer),
(playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate)),
(channelDataChunk = playbackBuffer.getChannelData(0)),
channelDataChunk.set(ea),
(K[3] = playbackBuffer);
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J = Math.round(audioSampleRate / 48e3);
1 > J && (J = 1);
la = 512 * J;
da = [T, playbackBuffer, da, Z];
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playbackBuffer = currentAudioContext.createBuffer(1, la, audioSampleRate);
channelDataChunk = playbackBuffer.getChannelData(0);
channelDataChunk.set(D);
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}
currentConvolver.normalize = !1;
currentConvolver.buffer = K[0];
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ua,
z,
oa,
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webSocket = new WebSocket("ws://" + window.location.host + "/~~stream");
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va = 0,
ba = 0,
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W = 2,
wsMessageReceiveTime,
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P && P++;
wsMessageReceiveTime = new Date().getTime();
qa = g;
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a > F / 2 && (a = 0);
b > F / 2 && (b -= F);
b /= v;
H += 0.01 * (a / v - H);
1e9 > L && (H = N);
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if (d < 0.25 * -N || d > 0.5 * N) O = 1;
0.01 < Math.abs(d) && 20 > W && (O = 1);
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x = O ? a : x + 0.003 * (a - x);
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0.995 > x && (x = 0.995);
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Math.round(1e3 * N) +
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Math.round(1e3 * H) +
" " +
Math.round(1e6 * (x - 1)) +
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O +
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soundAppletDebugHtml += currentAudioContext ? " WebAudio " : " none ";
soundAppletDebugHtml += actualAudioSampleRate.toFixed(2) + " " + actualRemoteSampleRate.toFixed(2);
document.getElementById("soundappletdebug").innerHTML = soundAppletDebugHtml;
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c = g;
lastlen = b.length;
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var f = 0,
l = 0;
if (240 == (b[a] & 240))
(smeter = 256 * (b[a] & 15) + b[a + 1]),
soundApplet.smetercallback && soundApplet.smetercallback(10 * smeter),
a++;
else if (128 == b[a]) {
var e;
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g += 128;
g >= F && (g -= F);
var a = a + 128,
j;
for (j = 0; 20 > j; j++) D[j] = E[j] = 0;
aa = 0;
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(l = 4), (f = 2), (z = 14 - (b[a] >> 4));
else if (128 != (b[a] & 128)) (l = 1), (f = 2);
else if (129 == b[a])
(j = 256 * b[a + 1] + b[a + 2]),
j != remoteSampleRate && ((remoteSampleRate = j), (R = g)),
webSocket && webSocket.postMessage({ type: "samplerate", samplerate: remoteSampleRate }, "*"),
0 < remoteSampleRate ? (ja = 1) : ((ja = 0), stopall()),
(a += 2);
else if (130 == b[a]) (ua = 256 * b[a + 1] + b[a + 2]), (a += 2);
else if (131 == b[a])
(oa = b[a + 1]),
(j = b[a + 1] & 15),
j != fa && ((fa = j), currentConvolver && (currentConvolver.buffer = K[fa])),
a++;
else if (132 == b[a]) {
Y += 128;
for (e = 0; 128 > e; e++) y[g + e] = 0;
g += 128;
g >= F && (g -= F);
for (j = 0; 20 > j; j++) D[j] = E[j] = 0;
aa = 0;
} else
133 == b[a] &&
((d =
16777216 *
(((b[a + 1] & 15) << 16) + (b[a + 2] << 8) + b[a + 3]) +
(b[a + 4] << 16) +
(b[a + 5] << 8) +
b[a + 6]),
(e = b[a + 1] >> 4),
soundApplet.truefreqcallback && soundApplet.truefreqcallback(d, e),
(a += 6));
if (2 == f) {
f = Y = 0;
for (j = 16 == (oa & 16) ? 12 : 14; 128 > f; ) {
d =
(b[a + 3] & 255) |
((b[a + 2] & 255) << 8) |
((b[a + 1] & 255) << 16) |
((b[a + 0] & 255) << 24);
d <<= l;
e = 0;
var n;
n = 15 - z;
var s = ua,
u = [999, 999, 8, 4, 2, 1, 99, 99];
if (0 != d) for (; 0 == (d & 2147483648) && e < n; ) (d <<= 1), e++;
e < n
? ((n = e), e++, (d <<= 1))
: ((n = (d >> 24) & 255), (e += 8), (d <<= 8));
var q = 0;
n >= u[z] && q++;
n >= u[z - 1] && q++;
q > z - 1 && (q = z - 1);
u = (((d >> 16) & 65535) >> (17 - z)) & (-1 << q);
u += n << (z - 1);
0 != (d & (1 << (32 - z + q))) && ((u |= (1 << q) - 1), (u = ~u));
for (l += e + z - q; 8 <= l; ) a++, (l -= 8);
for (e = d = 0; 20 > e; e++) d += D[e] * E[e];
d |= 0;
d = 0 <= d ? d >> 12 : (d + 4095) >> 12;
s = u * s + s / 2;
u = s >> 4;
for (e = 19; 0 <= e; e--) {
D[e] += -(D[e] >> 7) + ((E[e] * u) >> j);
if (0 == e) break;
E[e] = E[e - 1];
}
E[0] = d + s;
d = E[0] + (aa >> 4);
aa = 16 == (oa & 16) ? 0 : aa + ((E[0] << 4) >> 3);
y[g++] = d;
g >= F && (g -= F);
f++;
}
0 == l && a--;
}
}
e = g - c;
0 > e && (e += F);
ba += e;
L += (1e3 * e) / remoteSampleRate;
wsMessageReceiveTime < L && (L = wsMessageReceiveTime);
ba >= remoteSampleRate &&
((j = 1e3 * (ba / (L - va))),
j < 1.01 * remoteSampleRate && j > 0.99 * remoteSampleRate && (actualRemoteSampleRate += (j - actualRemoteSampleRate) / W),
(ba = 0),
100 > W && W++,
(va = L),
(L = wsMessageReceiveTime));
webSocket &&
((b = c),
c > g && (webSocket.postMessage(y.subarray(c), "*"), (b = 0)),
g > b && webSocket.postMessage(y.subarray(b, g), "*"));
if (S && !(Y > 2 * remoteSampleRate))
for (; c != g; ) {
for (X += ka / remoteSampleRate; 1 <= X; )
S.setInt16(A, y[c], !0),
(A += 2),
65536 <= A &&
((b = new ArrayBuffer(65536)),
(A = 0),
(S = new DataView(b)),
B.push(b)),
X--;
c++;
c >= F && (c -= F);
}
if (ma) {
if ((c = document.getElementById("audiostartbutton")))
c.style.display = "suspended" === currentAudioContext.state ? "block" : "none";
"running" === currentAudioContext.state && (ma = 0);
}
};
webSocket.onopen = function () {
soundappletstarted();
};
webSocket.onclose = function () {
for (var c = 0; c < F; c++) y[c] = 0;
webSocket.onclose = h;
webSocket = webSocket.onmessage = h;
};
this.setparam = function (c) {
try {
webSocket.send("GET /~~param?" + c);
} catch (a) {}
};
this.smeter = function () {
return 10 * smeter;
};
this.getid = function () {
return ja;
};
this.mute = function (newValue) {
muted = newValue;
!S && !webSocket && this.setparam("mute=" + newValue);
};
this.setvolume = function (newVolume) {
volume = newVolume;
};
this.setdelay1 = function (c) {
ta = c;
H = N = c / 8e3;
p = (F + g - ta) % F;
};
stopall = function () {
currentAudioContext
? (webSocket.close(),
(scriptProcessor.onaudioprocess = h),
scriptProcessor.disconnect(),
(channelDataChunk = K = this.p = currentAudioContext = $ = currentConvolver = scriptProcessor = scriptProcessor.destination = h))
: webSocket.close();
};
this.restartaudio = function () {
stopall();
document.audioContext = new AudioContext();
window.prep_html5sound();
};
this.destroy = function () {
stopall();
window.soundapplet = h;
};
this.rec_start = function () {
A = 0;
ka = remoteSampleRate;
X = 0;
var c = new ArrayBuffer(65536);
S = new DataView(c);
B = [c];
muted && this.setparam("mute=0");
};
this.rec_finish = function () {
B[B.length - 1] = B[B.length - 1].slice(0, A);
S = h;
var c = {};
c.wavdata = B;
c.len = 65536 * (B.length - 1) + A;
c.sr = ka;
!webSocket && muted && this.setparam("mute=1");
return c;
};
this.rec_length_kB = function () {
return (65536 * (B.length - 1) + A) / 1024;
};
this.setbcaudio = function (c) {
webSocket = c;
muted &&
(c && this.setparam("mute=0"),
!c && !recaudio && this.setparam("mute=1"));
c && webSocket.postMessage({ type: "samplerate", samplerate: remoteSampleRate }, "*");
};
this.setstereo = function (c) {
0 > c
? (currentConvolver.disconnect(), currentConvolver.connect(currentAudioContext.destination))
: ($ || (($ = currentAudioContext.createChannelMerger()), $.connect(currentAudioContext.destination)),
currentConvolver.disconnect(),
currentConvolver.connect($, 0, c));
};
this.audioresume = function () {
currentAudioContext.resume();
var audioStartButton = document.getElementById("audiostartbutton");
audioStartButton && (audioStartButton.style.display = "none");
ma = 0;
};
}
window.prep_html5sound = function () {
window.soundapplet = new za();
};
prep_html5sound();
})();
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import netscape.javascript.JSObject;
public class websdrsound extends Applet implements LineListener, Runnable, MouseListener {
private SourceDataLine I;
private Socket I1;
private InputStream II;
OutputStream Il;
static final long serialVersionUID = 1L;
int I11 = -2;
int II1 = -2;
int Il1 = -1;
int I1I = 0;
int III = 0;
final float IlI = 200.0F;
int I1l = 0;
String IIl = "";
int Ill = -1;
Thread I111;
boolean II11 = true;
boolean Il11 = false;
public int smeter = -32767;
public int l = 0;
public int I1I1 = this.l;
double III1 = 1.0D;
float IlI1 = 1.0F;
double I1l1 = 0.0D;
double IIl1 = 0.0D;
final int Ill1 = 23;
final int I11I = 128;
final int II1I = 48;
float Il1I = 1.0F;
final float[] lll1l1l = new float[3];
float lll1ll1;
long I1II = 0L;
long llll11l = 0L;
float llll111 = 0.0F;
final float[] lll1lll = new float[4];
final short[] lll11ll = new short[] {
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, -7552, -7296,
-8064, -7808, -6528, -6272, -7040, -6784, -2752, -2624, -3008, -2880,
-2240, -2112, -2496, -2368, -3776, -3648, -4032, -3904, -3264, -3136,
-3520, -3392, -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
-30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136, -11008, -10496,
-12032, -11520, -8960, -8448, -9984, -9472, -15104, -14592, -16128, -15616,
-13056, -12544, -14080, -13568, -344, -328, -376, -360, -280, -264,
-312, -296, -472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40, -216, -200,
-248, -232, -152, -136, -184, -168, -1376, -1312, -1504, -1440,
-1120, -1056, -1248, -1184, -1888, -1824, -2016, -1952, -1632, -1568,
-1760, -1696, -688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848, 5504, 5248,
6016, 5760, 4480, 4224, 4992, 4736, 7552, 7296, 8064, 7808,
6528, 6272, 7040, 6784, 2752, 2624, 3008, 2880, 2240, 2112,
2496, 2368, 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, 30208, 29184,
32256, 31232, 26112, 25088, 28160, 27136, 11008, 10496, 12032, 11520,
8960, 8448, 9984, 9472, 15104, 14592, 16128, 15616, 13056, 12544,
14080, 13568, 344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424, 88, 72,
120, 104, 24, 8, 56, 40, 216, 200, 248, 232,
152, 136, 184, 168, 1376, 1312, 1504, 1440, 1120, 1056,
1248, 1184, 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592, 944, 912,
1008, 976, 816, 784, 880, 848 };
boolean IIII = false;
int IlII = 5;
float I1lI = 0.0F;
int IIlI = 0;
float IllI = 0.0F;
float[] lll1111 = new float[272];
float[] lll111l = new float[1552];
byte[] lll11l1 = new byte[3120];
int I11l = 1;
float[] lll1l11 = new float[20];
int II1l = 1;
int Il1l = 0;
static Class I1Il;
public static void main(String[] paramArrayOfString) {
System.out.println("Copyright 2007-2016, Pieter-Tjerk de Boer, PA3FWM, [email protected] - All rights reserved.");
System.out.println("Since the intended use of this (or any) applet involves sending a copy to the client computer, I (PA3FWM) hereby allow making it available unmodified, as part of the original .jar file, via my original WebSDR server software, to original WebSDR clients.");
System.out.println("Other use, including distribution in part or entirety in other forms or as part of other software, or reverse engineering is not allowed without my explicit prior permission.");
}
public void stop() {
this.I111 = null;
this.IIl = "stop()";
I();
}
public void destroy() {
stop();
}
public void paint(Graphics paramGraphics) {
paramGraphics.drawString("WebSDR sound applet", 10, 10);
paramGraphics.drawString("Copyright 2007-2016, P.T. de Boer, [email protected]", 10, 24);
paramGraphics.drawString("Java version: " + System.getProperty("java.version"), 10, 88);
if (this.II11)
return;
paramGraphics.drawString(this.I11 + " " + this.IIl + " " + this.Ill + this.l, 10, 40);
paramGraphics.drawString(this.III + " " + this.I1I, 10, 52);
paramGraphics.drawString(this.I1l + " " + 200.0F, 10, 64);
paramGraphics.drawString((int)(0.5D + (this.IlI1 * 8000.0F)) + " " + (int)(0.5D + (this.III1 - 1.0D) * 1000000.0D) + " " + (int)(0.5D + (1.0D - this.IIl1 / 6.0D / this.I1l1 * this.IlI1) * 1000000.0D), 10, 76);
}
void I() {
if (this.II11)
return;
repaint();
}
public void mouseEntered(MouseEvent paramMouseEvent) {}
public void mouseExited(MouseEvent paramMouseEvent) {}
public void mouseReleased(MouseEvent paramMouseEvent) {}
public void mousePressed(MouseEvent paramMouseEvent) {}
public void I(MouseEvent paramMouseEvent) {}
public void mouseClicked(MouseEvent paramMouseEvent) {
this.II11 = !this.II11;
repaint();
}
public int getid() {
return this.Ill;
}
public int I1() {
return this.smeter;
}
public String javaversion() {
return System.getProperty("java.version");
}
public void setparam(String paramString) {
paramString = "GET /~~param?ppm=" + (int)(0.5D + (this.III1 - 1.0D) * 1000000.0D) + "&ppml=" + (int)(0.5D + (1.0D - this.IIl1 / 6.0D / this.I1l1 * this.IlI1) * 1000000.0D) + "&" + paramString + "\r\n\r\n";
try {
this.Il.write(paramString.getBytes(), 0, paramString.length());
} catch (Exception exception) {}
this.IIl1 = this.I1l1 = 0.0D;
}
public void setvolume(float paramFloat) {
this.Il1I = paramFloat;
}
public void start() {
AudioFormat audioFormat = new AudioFormat(48000.0F, 16, 1, true, false);
DataLine.Info info = new DataLine.Info((I1Il == null) ? (I1Il = I("javax.sound.sampled.SourceDataLine")) : I1Il, audioFormat, 96000);
try {
this.I = (SourceDataLine)AudioSystem.getLine(info);
this.I.open(audioFormat, 96000);
} catch (LineUnavailableException lineUnavailableException) {}
this.I.addLineListener(this);
this.I.start();
try {
int i = getCodeBase().getPort();
if (i < 0)
i = 80;
this.I1 = new Socket(getCodeBase().getHost(), i);
this.II = this.I1.getInputStream();
this.Il = this.I1.getOutputStream();
this.Il.write("GET /~~stream?java=1&23\r\n\r\n".getBytes(), 0, 27);
this.I11 = 1;
I();
} catch (Exception exception) {
this.I11 = -3;
I();
}
this.I11 = 4;
this.IIl = "start()";
this.I111 = new Thread(this);
this.I111.start();
JSObject.getWindow(this).eval("soundappletstarted()");
addMouseListener(this);
I();
this.I1II = System.currentTimeMillis();
}
void I(int paramInt) {
if (this.Ill == -1) {
this.Ill = paramInt;
} else if ((paramInt & 0x8000) == 0) {
this.smeter = paramInt;
} else {
paramInt &= 0x7FFF;
if ((paramInt & 0x4000) == 0)
this.IlI1 = paramInt / 8000.0F;
}
}
void I1(int paramInt) {
this.I1l1 += paramInt;
this.Il1 = this.I.getBufferSize() - this.I.available();
if (!this.I.isActive()) {
this.I1I++;
this.Il1 = -1;
}
this.I11++;
this.lll1l1l[0] = this.lll1l1l[1];
this.lll1l1l[1] = this.lll1l1l[2];
this.lll1l1l[2] = this.I.getFramePosition() / 48.0F - (float)(System.currentTimeMillis() - this.I1II);
if (this.lll1l1l[1] > this.lll1l1l[0] && this.lll1l1l[1] > this.lll1l1l[2])
this.lll1ll1 = 0.1F * this.lll1l1l[1] + 0.9F * this.lll1ll1;
for (byte b2 = 0; b2 < paramInt; b2++) {
for (byte b = 0; b < 6; b++) {
byte b3;
float[] arrayOfFloat2 = {
-0.0030657F, -0.0027421F, -0.0028342F, -0.0018084F, 5.5067E-4F, 0.0040855F, 0.0081821F, 0.011793F, 0.01366F, 0.01262F,
0.0080115F, 1.7366E-5F, -0.010139F, -0.020236F, -0.027388F, -0.028593F, -0.02145F, -0.0048089F, 0.020752F, 0.052804F,
0.087352F, 0.11948F, 0.14428F, 0.15778F, 0.15778F, 0.14428F, 0.11948F, 0.087352F, 0.052804F, 0.020752F,
-0.0048089F, -0.02145F, -0.028593F, -0.027388F, -0.020236F, -0.010139F, 1.7366E-5F, 0.0080115F, 0.01262F, 0.01366F,
0.011793F, 0.0081821F, 0.0040855F, 5.5067E-4F, -0.0018084F, -0.0028342F, -0.0027421F, -0.0030657F };
float[] arrayOfFloat1 = {
-0.0024615F, -0.0072497F, -0.0080908F, -0.0078587F, -0.0024454F, 0.0045784F, 0.010045F, 0.009404F, 0.0018009F, -0.0092801F,
-0.016675F, -0.013973F, -1.8887E-4F, 0.017873F, 0.028294F, 0.020954F, -0.0048033F, -0.036754F, -0.053709F, -0.035879F,
0.023444F, 0.11149F, 0.19934F, 0.25408F, 0.25408F, 0.19934F, 0.11149F, 0.023444F, -0.035879F, -0.053709F,
-0.036754F, -0.0048033F, 0.020954F, 0.028294F, 0.017873F, -1.8887E-4F, -0.013973F, -0.016675F, -0.0092801F, 0.0018009F,
0.009404F, 0.010045F, 0.0045784F, -0.0024454F, -0.0078587F, -0.0080908F, -0.0072497F, -0.0024615F };
this.lll111l[16 + 6 * b2 + b] = 0.0F;
if (this.Il11) {
for (b3 = 0; b3 < 8; b3++)
this.lll111l[16 + 6 * b2 + b] = this.lll111l[16 + 6 * b2 + b] + this.lll1111[b2 + 7 + b3] * arrayOfFloat1[6 * b3 + 5 - b];
} else {
for (byte b4 = 0; b4 < 8; b4++)
this.lll111l[16 + 6 * b2 + b] = this.lll111l[16 + 6 * b2 + b] + this.lll1111[b2 + 7 + b4] * b3[6 * b4 + 5 - b];
}
this.lll111l[16 + 6 * b2 + b] = this.lll111l[16 + 6 * b2 + b] * 6.0F;
}
}
int i = paramInt * 6;
byte b1;
for (b1 = 0; this.I1lI < i; b1++) {
int j = (int)this.I1lI + 16;
float f1 = this.I1lI - (j - 16);
f1 = (1.0F - f1) * this.lll111l[j - 1] + f1 * this.lll111l[j];
if (2 * b1 > 3100)
break;
this.lll11l1[2 * b1] = (byte)((int)f1 & 0xFF);
this.lll11l1[2 * b1 + 1] = (byte)((int)f1 >> 8);
this.I1lI = (float)(this.I1lI + this.III1 * this.IlI1);
}
this.I1lI -= i;
if (this.IIlI == 0) {
this.I.write(this.lll11l1, 0, b1 * 2);
this.IIl1 += b1;
} else if (b1 < this.IIlI) {
this.IIlI -= b1;
} else {
this.I.write(this.lll11l1, this.IIlI * 2, (b1 - this.IIlI) * 2);
this.IIlI = 0;
this.IIl1 += (b1 - this.IIlI);
}
if (this.llll11l == 0L)
this.llll111 = (float)this.llll11l;
this.llll11l += b1;
this.lll1lll[0] = this.lll1lll[1];
this.lll1lll[1] = this.lll1lll[2];
this.lll1lll[2] = this.lll1lll[3];
this.lll1lll[3] = (float)this.llll11l / 48.0F - (float)(System.currentTimeMillis() - this.I1II);
if (this.IIlI == 0 && this.lll1lll[3] < this.lll1ll1 && this.llll111 > this.lll1ll1 + 150.0F) {
this.IIlI = (int)(this.lll1ll1 - this.lll1lll[3]);
this.III++;
this.llll111 -= this.IIlI;
this.lll1lll[0] = this.lll1lll[0] - this.IIlI;
this.lll1lll[1] = this.lll1lll[1] - this.IIlI;
this.lll1lll[2] = this.lll1lll[2] - this.IIlI;
this.lll1lll[3] = this.lll1lll[3] - this.IIlI;
this.lll1ll1 -= this.IIlI;
this.IIlI *= 48;
this.llll11l -= this.IIlI;
}
if (this.lll1lll[1] > this.lll1lll[0] && this.lll1lll[1] > this.lll1lll[2] && this.lll1lll[1] > this.lll1lll[3])
this.llll111 = this.lll1lll[1];
for (paramInt = 0; paramInt < 16; paramInt++) {
this.lll111l[paramInt] = this.lll111l[i + paramInt];
this.lll1111[paramInt] = this.lll1111[i / 6 + paramInt];
}
float f = this.llll111 - this.lll1ll1;
this.I1l = (int)f;
f -= 200.0F;
f /= 3.0F;
this.IllI = 0.999F * this.IllI + 0.001F * f;
if (this.IllI < -40.0F)
this.IllI = -40.0F;
if (this.IllI > 40.0F)
this.IllI = 40.0F;
this.III1 = (1.0F + this.IllI * 5.0E-5F);
if (f > 200.0F) {
this.IIlI = (int)f;
this.III++;
this.llll111 -= this.IIlI;
this.lll1lll[0] = this.lll1lll[0] - this.IIlI;
this.lll1lll[1] = this.lll1lll[1] - this.IIlI;
this.lll1lll[2] = this.lll1lll[2] - this.IIlI;
this.lll1lll[3] = this.lll1lll[3] - this.IIlI;
this.IIlI *= 48;
this.llll11l -= this.IIlI;
}
}
void I(float paramFloat, int paramInt) {
for (byte b = 19; b > 0; b--)
this.lll1l11[b] = this.lll1l11[b - 1];
this.lll1l11[0] = paramFloat;
float f = this.lll1l11[10];
if (this.II1l >= 0) {
f = 0.0F;
float[][] arrayOfFloat = { { 0.0416798F, -0.0010372F, -0.0316519F, 0.0592284F, -0.0496101F, -0.0066906F, 0.0774353F, -0.0963F, -0.0179755F, 0.5594503F }, { 0.030725F, 0.062421F, -0.028814F, -0.027426F, -0.056624F, -0.034655F, 0.021408F, 0.110595F, 0.199341F, 0.255473F } };
for (byte b1 = 0; b1 < 10; b1++)
f += arrayOfFloat[this.II1l][b1] * (this.lll1l11[b1] + this.lll1l11[19 - b1]);
}
this.lll1111[paramInt + 16] = f * this.Il1I;
if (paramInt == 127)
I1(128);
}
public void run() {
byte[] arrayOfByte = new byte[264];
int[] arrayOfInt3 = new int[20];
int[] arrayOfInt2 = new int[20];
int[] arrayOfInt1 = new int[20];
int m = 0;
byte b1 = 0;
byte b = -1;
char c = Character.MIN_VALUE;
int k = 0;
int j = 256;
int i = 0;
this.Ill = -1;
try {
while (Thread.currentThread() == this.I111) {
this.I11++;
I();
this.I1I1 = this.l;
int i1 = 0;
int n = 0;
while (c < ') {
i1 = this.II.read(arrayOfByte, m, 260 - m);
if (i1 < 0)
break;
m += i1;
boolean bool = true;
while (bool && m > 0) {
int i2 = 0;
if (b == -1) {
if (m < 2) {
bool = false;
} else {
b = 0;
int i3 = (arrayOfByte[0] & 0xFF) + ((arrayOfByte[1] & 0xFF) << 8);
I(i3);
i2 = 2;
}
} else if (b == 0) {
if ((arrayOfByte[0] & 0x80) != 128) {
n = 1;
b = 2;
c = Character.MIN_VALUE;
} else if (arrayOfByte[0] >= -112 && arrayOfByte[0] <= -33) {
n = 4;
b = 2;
c = Character.MIN_VALUE;
i = 6 - (0xF & arrayOfByte[0] - 128 >> 4);
} else if (arrayOfByte[0] == Byte.MIN_VALUE) {
b = 1;
i2 = 1;
} else if ((arrayOfByte[0] & 0xF0) == 240) {
if (m < 2) {
bool = false;
} else {
this.smeter = 10 * (((arrayOfByte[0] & 0xF) << 8) + (arrayOfByte[1] & 0xFF));
i2 = 2;
}
} else if (arrayOfByte[0] == -127) {
if (m < 3) {
bool = false;
} else {
int i3 = (arrayOfByte[1] << 8) + (arrayOfByte[2] & 0xFF);
this.IlI1 = i3 / 8000.0F;
i2 = 3;
}
} else if (arrayOfByte[0] == -126) {
if (m < 3) {
bool = false;
} else {
int i3 = (arrayOfByte[1] << 8) + (arrayOfByte[2] & 0xFF);
j = i3;
i2 = 3;
}
} else if (arrayOfByte[0] == -125) {
if (m < 2) {
bool = false;
} else {
this.Il1l = arrayOfByte[1];
this.II1l = (arrayOfByte[1] & 0xF) - 1;
if (this.II1l == 2) {
this.II1l = 0;
this.Il11 = true;
} else {
this.Il11 = false;
}
i2 = 2;
}
} else if (arrayOfByte[0] == -124) {
i2 = 1;
c = ';
for (byte b2 = 0; b2 < '; b2++)
this.lll1111[b2 + 16] = 0.0F;
I1(128);
for (i1 = 0; i1 < 20; i1++) {
arrayOfInt2[i1] = 0;
arrayOfInt3[i1] = 0;
}
k = 0;
} else if (arrayOfByte[0] == -123) {
if (m < 7) {
bool = false;
} else {
i2 = 7;
}
} else {
i2 = 1;
this.IIII = true;
bool = false;
}
} else if (b == 1) {
if (m < 128 || c == ') {
bool = false;
} else {
for (byte b2 = 0; b2 < 20; b2++) {
arrayOfInt2[b2] = 0;
arrayOfInt3[b2] = 0;
}
k = 0;
i1 = 0;
while (i1 < m && c < ') {
this.lll1111[c + 16] = this.lll11ll[(short)arrayOfByte[i1] & 0xFF];
I(this.lll11ll[(short)arrayOfByte[i1] & 0xFF], c);
i1++;
c++;
}
i2 = 128;
b = 0;
bool = false;
}
}
if (b == 2) {
i1 = 0;
byte b2 = ((this.Il1l & 0x10) == 16) ? 12 : 14;
while (i1 < m && c < ') {
int i4 = (arrayOfByte[i1 + 3] & 0xFF) + ((arrayOfByte[i1 + 2] & 0xFF) << 8) + ((arrayOfByte[i1 + 1] & 0xFF) << 16) + ((arrayOfByte[i1 + 0] & 0xFF) << 24);
int i5 = i4 << n;
int i10 = n;
int i9 = i5;
byte b3 = 0;
int i6 = 15 - i;
int i8 = j;
int[] arrayOfInt = { 999, 999, 8, 4, 2, 1, 99, 99 };
if (i5 != 0)
while ((i5 & Integer.MIN_VALUE) == 0 && b3 < i6) {
i5 <<= 1;
b3++;
}
if (b3 < i6) {
i7 = b3;
b3++;
i6 = i5 << 1;
} else {
i7 = i5 >> 24 & 0xFF;
b3 += 8;
i6 = i5 << 8;
}
i5 = 0;
if (i7 >= arrayOfInt[i])
i5++;
if (i7 >= arrayOfInt[i - 1])
i5++;
if (i5 > i - 1)
i5 = i - 1;
int i3 = (i6 >> 16 & 0xFFFF) >> 17 - i & -1 << i5;
i3 += i7 << i - 1;
if ((i6 & 1 << 32 - i + i5) != 0) {
i3 |= (1 << i5) - 1;
i3 ^= 0xFFFFFFFF;
}
for (n += b3 + i - i5; n >= 8; n -= 8)
i1++;
if (i9 == 0 || i1 + (7 + n) / 8 > m) {
bool = false;
n = i10;
break;
}
i2 = i1;
i6 = 0;
for (i5 = 0; i5 < 20; i5++)
i6 += arrayOfInt3[i5] * arrayOfInt2[i5];
i5 = i6 / 4096;
int i7 = i3 * i8 + i8 / 2;
i6 = i7 >> 4;
for (i3 = 0; i3 < 20; i3++)
arrayOfInt3[i3] = arrayOfInt3[i3] + -(arrayOfInt3[i3] >> 7) + (arrayOfInt2[i3] * i6 >> b2);
for (i3 = 19; i3 > 0; i3--) {
arrayOfInt2[i3] = arrayOfInt2[i3 - 1];
arrayOfInt1[i3] = arrayOfInt1[i3 - 1];
}
arrayOfInt2[0] = i5 + i7;
i3 = i5 + i7 * this.I1I1 + (k >> 4);
if ((this.Il1l & 0x10) == 16) {
k = 0;
} else {
k += arrayOfInt2[0] << 4 >> 3;
}
I(i3, c);
c++;
}
if (c == ') {
b = 0;
if (n > 0) {
i2++;
n = 0;
}
}
b1++;
}
if (i2 > 0)
for (i1 = i2; i1 < m; i1++)
arrayOfByte[i1 - i2] = arrayOfByte[i1];
m -= i2;
}
if (this.IIII || m < 0)
break;
}
if (c == ')
c = Character.MIN_VALUE;
this.II1 = i1;
this.I11++;
if (this.IIII || i1 == -1)
break;
}
} catch (IOException iOException) {
this.IIl = "!" + iOException.getMessage();
}
this.IIl = "^" + this.IIl;
this.I.flush();
this.I.stop();
this.I.close();
try {
this.I1.close();
} catch (Exception exception) {}
this.I11 = -5;
I();
}
public void update(LineEvent paramLineEvent) {}
static Class I(String paramString) {
try {
return Class.forName(paramString);
} catch (ClassNotFoundException classNotFoundException) {
throw (new NoClassDefFoundError()).initCause(classNotFoundException);
}
}
}
@kevinelliott
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Author

@einball I'd love to see what you've done. Any chance you could contact me privately about it?

@realies
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realies commented Aug 11, 2023

@einball I'd love to see what you've done. Any chance you could contact me privately about it?

+1

@idramm25
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idramm25 commented Jan 17, 2024

I made a python script to connect to the server and record the stream to a file. then try to listen to it with the second script. in the speakers there is something similar to white noise with sound artifacts in the form of snatches of speech.
making raw: https://pastebin.com/SPhn5bS8
play raw: https://pastebin.com/m2qxAeFh
wav to raw from web: https://pastebin.com/M0xfJfvs
my goal is something like that:
121212

@kevinelliott
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Author

Interesting. I would be willing to bet there is some encoding happening to prevent this very thing that we need to figure out.

@degenoah
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degenoah commented Jul 5, 2024

my attempt to clean up the latest version to the best of my abilities.

many variables end up getting reused and as a result there's likely some control flow errors from trying to split these.

(function() {
  function SoundApplet() {
    function processEvent(audioProcessEvent) {
      var channelData = audioProcessEvent.outputBuffer.getChannelData(0);
      var bufferLength = audioProcessEvent.outputBuffer.length;

      processStartTime = (new Date).getTime();
      var timeDifference = processStartTime - wsMessageReceiveTime;
      
      var d = ta + timeDifference / 1000 * remoteSampleRate - p * 
              remoteSampleRate - bufferLength * x / audioSampleRate;
      d = Math.round(d);
      d = (2 * unk_const_5731 + d) % unk_const_5731;
      
      var unk_1354 = 1000 * ((t - d + 2.5 * unk_const_5731) % 
                     unk_const_5731 - unk_const_5731 / 2) / remoteSampleRate;

      if (L) {
        unk_1354 = Math.abs(unk_1354);
        
        if (unk_1354 < 500 * p) {
          L = 0;
        }
        
        if (1 == F) {
          L = 0;
        }
      }

      if (L || 3 <= F) {
        ua = L ? "r" + unk_1354.toFixed(0) : "u" + Da.toFixed(0);
        var f = 0;
        var g = 0;
        var e = 0;

        for (var chIndex = 0; chIndex < G.length; chIndex++) {
          channelData = G[chIndex];

          if (channelData > f) {
            e = g;
            g = f;
            f = channelData;
          } else if (channelData > g) {
            e = g;
            g = channelData;
          } else if (channelData > e) {
            e = channelData;
          }
        }

        p = 1.5 * (e / 1000);

        if (p <= 0.125) {
          p = 0.125;
        }

        if (p >= 0.7) {
          p = 0.7;
        }

        // `d` was previously used for the last loop, so it was calculated again...
        // d = ta + timeDifference / 1000 * remoteSampleRate - p * 
        //     remoteSampleRate - bufferLength * x / audioSampleRate;
        // d = Math.round(d);
        // d = (2 * unk_const_5731 + d) % unk_const_5731;

        L = 0;

        if (F > 3) {
          F = 0;
        }

        channelData = t;

        if (Z > 0) {
          Z = -1;
          actualRemoteSampleRate *= remoteSampleRate / x;
          x = remoteSampleRate;
        }

        t = d;
        M = p;
        Ea++;
        va++;

        B = actualRemoteSampleRate / actualAudioSampleRate / (x / audioSampleRate);
      }

      var unk_1 = Math.abs(1000 * ((t - d + 2.5 * unk_const_5731) % 
                  unk_const_5731 - unk_const_5731 / 2) / remoteSampleRate);
      if (!(500 > unk_1)) {
        unk_1 = 500;
      }

      la += 0.1 * (unk_1 - la);

      if (unk_1354 < -500 * p) {
        L = 1;
      }

      var unk_2 = Math.floor(processStartTime - lastProcessTime - 1000 * 
                             bufferLength / actualAudioSampleRate);

      if (unk_2 < Ga) {
        if (unk_2 > G[0]) {
          G[0] = unk_2;
        }
      }

      lastProcessTime = processStartTime;

      var unk_const_tbl = [
        -0.00052849, -0.0007085, -0.000497, -0.00096915, -0.00098441, -0.0013791, 
        -0.0015351, -0.0019014, -0.0021403, -0.0024899, -0.0027631, -0.0030833, 
        -0.0033437, -0.0036043, -0.0038008, -0.0039597, -0.0040394, -0.004047, 
        -0.0039537, -0.0037585, -0.0034404, -0.0029934, -0.0024042, -0.0016671, 
        -0.00077343, 0.00027964, 0.0014943, 0.0028693, 0.0044015, 0.0060827, 
        0.0079045, 0.0098529, 0.011913, 0.014065, 0.016289, 0.018561, 0.020857, 
        0.023149, 0.025409, 0.027609, 0.029721, 0.031717, 0.03357, 0.035253, 
        0.036743, 0.03802, 0.039064, 0.039862, 0.0404, 0.040671, 0.040671, 0.0404, 
        0.039862, 0.039064, 0.03802, 0.036743, 0.035253, 0.03357, 0.031717, 
        0.029721, 0.027609, 0.025409, 0.023149, 0.020857, 0.018561, 0.016289, 
        0.014065, 0.011913, 0.0098529, 0.0079045, 0.0060827, 0.0044015, 0.0028693, 
        0.0014943, 0.00027964, -0.00077343, -0.0016671, -0.0024042, -0.0029934, 
        -0.0034404, -0.0037585, -0.0039537, -0.004047, -0.0040394, -0.0039597, 
        -0.0038008, -0.0036043, -0.0033437, -0.0030833, -0.0027631, -0.0024899, 
        -0.0021403, -0.0019014, -0.0015351, -0.0013791, -0.00098441, -0.00096915, 
        -0.000497, -0.0007085, -0.00052849
      ];

      for (var bufferIndex = 0; bufferIndex < bufferLength; bufferIndex++) {
        var unk_4517 = z[t];
        f = B * x / audioSampleRate;
        u += f;

        if (u > 1) {
          u -= 1;
          Ha = z[t];

          if (t == k) {
            if (!F) {
              Ia = processStartTime;
            }

            F = 1;
          } else {
            t++;

            if (t >= unk_const_5731) {
              t -= unk_const_5731;
            }
          }

          g = z[t];

          if (Ta) {
            unk_4517 = (u * g + (f - u) * unk_4517) / f;
          }

          if (t == Z) {
            Z = -1;
            actualRemoteSampleRate *= remoteSampleRate / x;
            x = remoteSampleRate;
          }
        }

        f = 0;
        f += 50 * z[t] * unk_const_tbl[Math.floor(50 * u)];
        f += 50 * Ha * unk_const_tbl[Math.floor(50 + 50 * u)];

        if (Ba && Ra <= 50) {
          ca_debug2_related += "d " + unk_4517 + " " + t + " " + u + " " + z[t] + " " + f + "<br>";
        }

        if ($ & 1) {
          unk_4517 = f;
        }

        if (muted) {
          unk_4517 = 0;
        }

        channelData[bufferIndex] = 0.00002 * unk_4517 * volume;
      }

      Ra++;

      if (Ba) {
        if (Ra > 50 && ca_debug2_related != "") {
          document.getElementById("soundappletdebug2").innerHTML = ca_debug2_related;
          ca_debug2_related = "";
          alert(1);
        }
      }

      X += 1000 * bufferLength / actualAudioSampleRate;

      if (processStartTime < X) {
        X = processStartTime;
      }

      ea += bufferLength;

      if (ea >= audioSampleRate) {
        channelData = 1000 * (ea / (X - Ka));

        if (channelData < 1.01 * audioSampleRate) {
          if (channelData > 0.99 * audioSampleRate) {
            actualAudioSampleRate += (channelData - actualAudioSampleRate) / fa;
          }
        }

        Ka = X;
        ea = 0;
        X = processStartTime;
        G.unshift(0);
        G.splice(30, 1);
      }
    }

    function Ua(audioProcessEvent) {
      var inputBuffer = audioProcessEvent.inputBuffer.getChannelData(0);
      var outputBuffer = audioProcessEvent.outputBuffer.getChannelData(0);
      
      var bufferLength = audioProcessEvent.outputBuffer.length;
      
      for (var l = 0; l < bufferLength; l++) {
        outputBuffer[l] = inputBuffer[l];

        if (Ca) {
          if (N_recording_related) {
            N_recording_related.setInt16(w, 0x3FFF * inputBuffer[l], true);
            
            w += 2;
            if (w >= Y) {
              var b = new ArrayBuffer(Y);
              w = 0;
              N_recording_related = new DataView(b);
              recordedBufferData.push(b);
            }
          }
        }
      }
    }

    document.getElementById("soundappletdiv").innerHTML = /*html*/`
      <div 
        onclick="var e = document.getElementById('soundappletdebug'); e.style.display = (e.style.display == 'none') ? 'block' : 'none';" 
        style="max-width:400px; min-height:50px; border-style:solid; border-color:black; background-color:white; color:black; 
               border-width:1px; margin:2px; padding:2px; font-family:sans-serif; font-size:x-small;"
      >
        WebSDR HTML5 sound FJ9 - Copyright 2007-2020, P.T. de Boer, [email protected]<br>
        <span id="soundappletdebug" style="display:none"></span>
      </div>
      <span id="soundappletdebug2"></span>
    `;

    var z = new Int16Array(unk_const_5731);
    var k = 0;
    var t = 6144;
    var u = 0;
    var remoteSampleRate = 8000;
    var x = 8000;
    var Z = -1;
    var actualRemoteSampleRate = 8000;
    var audioSampleRate = 48000;
    var actualAudioSampleRate = 48000;
    var B = 1;
    var volume = 1;
    var unk__ret_by_getid = -1;
    var N_recording_related;
    var w = 0;
    var Y = 65536;
    var recordedBufferData = []; // name is assumed.
    var unk_smplrate;
    var ga;
    var ha = 0;
    var soundApplet = this;
    var audioBroadcastChannel = null;
    var $ = 3;

    var const_tbl__Va = [-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784, -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368, -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392, -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944, -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136, -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472, -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568, -344, -328, 
    -376, -360, -280, -264, -312, -296, -472, -456, -504, -488, -408, -392, -440, -424, -88, -72, -120, -104, -24, -8, -56, -40, -216, -200, -248, -232, -152, -136, -184, -168, -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184, -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696, -688, -656, -752, -720, -560, -528, -624, -592, -944, -912, -1008, -976, -816, -784, -880, -848, 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736, 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784, 2752, 2624, 3008, 2880, 
    2240, 2112, 2496, 2368, 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392, 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136, 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472, 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568, 344, 328, 376, 360, 280, 264, 312, 296, 472, 456, 504, 488, 408, 392, 440, 424, 88, 72, 120, 104, 24, 8, 56, 40, 216, 200, 248, 232, 152, 136, 184, 168, 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184, 1888, 
    1824, 2016, 1952, 1632, 1568, 1760, 1696, 688, 656, 752, 720, 560, 528, 624, 592, 944, 912, 1008, 976, 816, 784, 880, 848];

    var const_tbl__un = [0.0084619, 3.6183E-4, 2.0264E-4, -4.8621E-5, -3.6771E-4, -7.0991E-4, -0.0010355, -0.0012935, -0.0014506, -0.0014733, -0.0013571, -0.0011019, -7.4253E-4, -3.0836E-4, 1.358E-4, 5.6517E-4, 8.8996E-4, 0.0010664, 0.0010912, 9.2941E-4, 6.0906E-4, 1.5494E-4, -3.7203E-4, -9.1186E-4, -0.001389, -0.0017416, -0.0019133, -0.0018764, -0.0016225, -0.0011768, -5.8255E-4, 9.2361E-5, 7.5528E-4, 0.0013306, 0.0017366, 0.0019135, 0.0018299, 0.0014834, 9.0902E-4, 1.6944E-4, -6.4513E-4, -0.0014333, -0.0020901, 
    -0.002526, -0.0026728, -0.0024998, -0.0020096, -0.0012556, -3.2129E-4, 6.8312E-4, 0.0016291, 0.0023941, 0.0028705, 0.0029846, 0.002705, 0.0020504, 0.0010884, -7.0093E-5, -0.0012848, -0.0024011, -0.0032709, -0.0037692, -0.0038134, -0.0033791, -0.0024966, -0.0012601, 1.8871E-4, 0.0016733, 0.0030042, 0.0040027, 0.0045239, 0.0044775, 0.0038421, 0.0026705, 0.0010869, -7.2511E-4, -0.0025439, -0.0041336, -0.0052788, -0.0058077, -0.0056185, -0.0046979, -0.0031235, -0.0010625, 0.0012472, 0.0035218, 0.005466, 
    0.0068099, 0.0073449, 0.0069525, 0.0056265, 0.0034784, 7.3321E-4, -0.0022942, -0.005233, -0.007697, -0.0093357, -0.0098779, -0.0091724, -0.0072151, -0.0041599, -3.1209E-4, 0.0038988, 0.007962, 0.011341, 0.013538, 0.014156, 0.012956, 0.0099028, 0.0051811, -7.971E-4, -0.0074221, -0.013934, -0.019491, -0.023251, -0.024456, -0.02252, -0.017099, -0.0081382, 0.0040987, 0.019038, 0.035829, 0.053411, 0.070595, 0.086169, 0.098999, 0.10813, 0.11288, 0.11288, 0.10813, 0.098999, 0.086169, 0.070595, 0.053411, 
    0.035829, 0.019038, 0.0040987, -0.0081382, -0.017099, -0.02252, -0.024456, -0.023251, -0.019491, -0.013934, -0.0074221, -7.971E-4, 0.0051811, 0.0099028, 0.012956, 0.014156, 0.013538, 0.011341, 0.007962, 0.0038988, -3.1209E-4, -0.0041599, -0.0072151, -0.0091724, -0.0098779, -0.0093357, -0.007697, -0.005233, -0.0022942, 7.3321E-4, 0.0034784, 0.0056265, 0.0069525, 0.0073449, 0.0068099, 0.005466, 0.0035218, 0.0012472, -0.0010625, -0.0031235, -0.0046979, -0.0056185, -0.0058077, -0.0052788, -0.0041336, 
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    9.656565E-4, 0.0012644532, 0.0013693135, 0.0012788905, 0.0010178421, 6.316952E-4, 1.796051E-4, -2.747173E-4, -6.715766E-4, -9.630688E-4, -0.0011186013, -0.0011278035, -0.0010001924, -7.630407E-4, -4.557272E-4, -1.245772E-4, 1.84623E-4, 4.320051E-4, 5.889058E-4, 6.40364E-4, 5.867386E-4, 4.414505E-4, 2.297496E-4, -1.72358E-5, -2.654101E-4, -4.834126E-4, -6.458231E-4, -7.360876E-4, -7.475333E-4, -6.843798E-4, -5.583476E-4, -3.887846E-4, -1.976636E-4, -6.746E-6, 1.628906E-4, 2.978334E-4, 3.876866E-4, 
    4.294803E-4, 4.263937E-4, 3.870879E-4, 3.218322E-4, 4.846206E-4];
    var const_tbl__Ma = [-1.47942E-4, -4.63086E-4, -5.43866E-4, -8.37905E-4, -0.001014311, -0.00116118, -0.001180796, -0.001076634, -8.36391E-4, -4.92451E-4, -9.4469E-5, 2.87595E-4, 5.82401E-4, 7.30717E-4, 7.01055E-4, 4.9903E-4, 1.69525E-4, -2.11135E-4, -5.51117E-4, -7.64022E-4, -7.90178E-4, -6.13389E-4, -2.67748E-4, 1.67964E-4, 5.87153E-4, 8.80407E-4, 9.63624E-4, 8.01554E-4, 4.19872E-4, -9.7144E-5, -6.23995E-4, -0.001024122, -0.001184736, -0.001047445, -6.27522E-4, -1.5309E-5, 6.42685E-4, 0.001177774, 0.001441643, 
    0.001347024, 8.94359E-4, 1.77665E-4, -6.33187E-4, -0.001332504, -0.001730079, -0.001701687, -0.001226744, -4.00227E-4, 5.84703E-4, 0.001480338, 0.002046494, 0.002113569, 0.001631749, 6.92239E-4, -4.88223E-4, -0.001615646, -0.002391073, -0.002589193, -0.002121436, -0.001068587, 3.30072E-4, 0.001729551, 0.002762744, 0.003135904, 0.002709835, 0.001546543, -9.4626E-5, -0.001812887, -0.003161817, -0.00376451, -0.003416048, -0.002148579, -2.37525E-4, 0.001855519, 0.003592039, 0.004493442, 0.004269849, 
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    8.01554E-4, 9.63624E-4, 8.80407E-4, 5.87153E-4, 1.67964E-4, -2.67748E-4, -6.13389E-4, -7.90178E-4, -7.64022E-4, -5.51117E-4, -2.11135E-4, 1.69525E-4, 4.9903E-4, 7.01055E-4, 7.30717E-4, 5.82401E-4, 2.87595E-4, -9.4469E-5, -4.92451E-4, -8.36391E-4, -0.001076634, -0.001180796, -0.00116118, -0.001014311, -8.37905E-4, -5.43866E-4, -4.63086E-4, -1.47942E-4];
    var const_tbl__Na = [-1.559505E-4, -7.98112E-5, -9.80814E-5, -1.173125E-4, -1.369746E-4, -1.565189E-4, -1.753732E-4, -1.929362E-4, -2.083552E-4, -2.206804E-4, -2.291911E-4, -2.333843E-4, -2.318305E-4, -2.244133E-4, -2.102E-4, -1.887765E-4, -1.597355E-4, -1.22856E-4, -7.82038E-5, -2.59739E-5, 3.34012E-5, 9.91605E-5, 1.702513E-4, 2.45599E-4, 3.235647E-4, 4.025475E-4, 4.805722E-4, 5.555847E-4, 6.253709E-4, 6.875873E-4, 7.399121E-4, 7.800625E-4, 8.058147E-4, 8.15116E-4, 8.062358E-4, 7.776257E-4, 7.282308E-4, 
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    0.0120782551, 0.0092645575, 0.0065829025, 0.0040611162, 0.0017236549, -4.087211E-4, -0.0023191615, -0.0039949083, -0.0054273698, -0.0066121147, -0.0075488253, -0.0082411169, -0.0086963572, -0.008925372, -0.0089421178, -0.0087633047, -0.0084079899, -0.0078971131, -0.0072530544, -0.0064991489, -0.0056592108, -0.0047570964, -0.0038162186, -0.002859177, -0.0019073471, -9.805496E-4, -9.67559E-5, 7.281494E-4, 0.0014805737, 0.0021493323, 0.0027257456, 0.003203659, 0.0035793947, 0.0038517234, 0.0040216824, 
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    -9.80814E-5, -7.98112E-5, -1.559505E-4];
    var const_tbl__Wa = [7.0433E-5, -1.0611E-5, -8.6755E-5, -1.81287E-4, -2.40082E-4, -2.16126E-4, -1.04338E-4, 4.4967E-5, 1.48777E-4, 1.41957E-4, 2.4902E-5, -1.26821E-4, -2.06025E-4, -1.44934E-4, 3.0288E-5, 2.06761E-4, 2.55662E-4, 1.2428E-4, -1.1508E-4, -3.01598E-4, -2.92187E-4, -6.8791E-5, 2.32511E-4, 4.01522E-4, 2.98948E-4, -3.3133E-5, -3.8003E-4, -4.90923E-4, -2.57989E-4, 1.88334E-4, 5.47393E-4, 5.48608E-4, 1.52152E-4, -3.96707E-4, -7.15685E-4, -5.49251E-4, 3.1938E-5, 6.48678E-4, 8.57479E-4, 4.66461E-4, 
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    var const_tbl__Xa = [-0, 1.983921580729042E-9, 2.075025014186962E-8, 3.7927907418138206E-8, -4.887230166144236E-8, -3.0134222374163864E-7, -5.164096309937236E-7, -2.427802968390461E-7, 7.578872729147132E-7, 1.936347430688365E-6, 1.9928593432900643E-6, -8.833327890479072E-8, -3.633685361514617E-6, -5.926187360916015E-6, -3.888518012581186E-6, 2.9394480591017127E-6, 1.0588006304239223E-5, 1.237826214562279E-5, 4.031116390349734E-6, -1.1335088291765613E-5, -2.3061493034081963E-5, -1.961540997059002E-5, 1.5431926802190891E-6, 
    2.8621954294876678E-5, 4.088648566767064E-5, 2.3477265415246905E-5, -1.825132435020537E-5, -5.725105950936853E-5, -6.105907613427537E-5, -1.7053594043356197E-5, 5.195062551563851E-5, 9.714386172375794E-5, 7.670648103584976E-5, -8.862781061563497E-6, -1.071900971490809E-4, -1.438814388965832E-4, -7.663514640042618E-5, 6.436023256906108E-5, 1.8483229047002838E-4, 1.8712644066413056E-4, 4.5880116008676896E-5, -1.5792930682603264E-4, -2.7937668887359577E-4, -2.098213726073394E-4, 3.2395551495906435E-5, 
    2.930589455766727E-4, 3.7654638964494447E-4, 1.8874570968166178E-4, -1.7350270831694483E-4, -4.643470536990024E-4, -4.518715625944161E-4, -9.69116897109054E-5, 3.864978130696432E-4, 6.538627129366464E-4, 4.7104717629236064E-4, -9.198398143389356E-5, -6.686777487330067E-4, -8.28712043395985E-4, -3.9270823310783866E-4, 3.9723623183352837E-4, 0.0010002233336305977, 9.408119990978091E-4, 1.7393840394085787E-4, -8.235942900930931E-4, -0.0013401798613667298, -9.297114887987371E-4, 2.2166011636270375E-4, 
    0.0013536203297926054, 0.001625025680809726, 7.289057261284617E-4, -8.140758051722581E-4, -0.0019413654191519833, -0.0017708819217589435, -2.7551082980417803E-4, 0.0015964459263299764, 0.0025088515660724045, 0.0016799475403552245, -4.775008778155763E-4, -0.0025256883298749597, -0.0029465993674170333, -0.0012510538277719042, 0.0015479183818790214, 0.0035158825953273166, 0.0031188536220775353, 3.934288998865438E-4, -0.002911574509003463, -0.004435720882383458, -0.0028732671993217467, 9.580060501031196E-4, 
    0.004492124341360815, 0.0051105150595499565, 0.0020536721864262875, -0.0028280591617187907, -0.0061546254603737065, -0.00532785326789502, -5.132327916508329E-4, 0.00518989395341977, 0.007702946112721694, 0.004843818321375578, -0.0018764094264846294, -0.00795915258040955, -0.00887853204366306, -0.0033829208723135, 0.005227159534473934, 0.010995240773062263, 0.009352948365577077, 6.168426802902624E-4, -0.00966135215649298, -0.014110446042209703, -0.008693943602339856, 0.003915133476790796, 0.015397374190484566, 
    0.017086355411157897, 0.006244593993185483, -0.011058960077660544, -0.02300534238884552, -0.019695824886880115, -6.866992974749606E-4, 0.022944702670610186, 0.034335180646351667, 0.021727748934421462, -0.01197169067339667, -0.04751214999276027, -0.057834991721873716, -0.023011276005042925, 0.05665114965901404, 0.15731258350755897, 0.24099996414442773, 0.2734204843167779, 0.24088000924476755, 0.15715600775834096, 0.05656657963472933, -0.022965475738754015, -0.0576911005215651, -0.04737028960461404, 
    -0.011929983013683818, 0.021641222352470783, 0.03418131747512627, 0.022830423052507886, -6.829356867897236E-4, -0.01957801398670588, -0.022856196117738148, -0.010981706488440811, 0.006197827633338942, 0.016949772891467887, 0.015266505785835134, 0.0038798722166704593, -0.008611222788126505, -0.013968994738359393, -0.009559560641714957, 6.100272064271946E-4, 0.009244793393562002, 0.010862414507424608, 0.0051613030636138155, -0.0033385385931099312, -0.008757408589602715, -0.007846392743178783, -0.0018488361106382115, 
    0.004770073070042823, 0.007581570047721741, 0.005105338678589917, -5.04594919508779E-4, -0.005235301544957861, -0.0060443631989364095, -0.0027758458330998117, 0.002014625337202301, 0.005010516416744247, 0.004401720855068482, 9.381884679538007E-4, -0.0028122057691922155, -0.004338929485727358, -0.0028463714895122817, 3.843909322671774E-4, 0.00304538992484389, 0.0034310027900693687, 0.001509632464837753, -0.001219363552568798, -0.002870184664293718, -0.002458654110841795, -4.6453461006792837E-4, 
    0.0016332889986342878, 0.002437601891857792, 0.0015500991660471824, -2.6733649268880465E-4, -0.0017171972803443588, -0.0018812454938858976, -7.88328200468433E-4, 7.053649796246619E-4, 0.0015714450556098374, 0.0013080617120597112, 2.140459851980433E-4, -8.971219193501259E-4, -0.0012922468074570053, -7.935420864160041E-4, 1.6746393274834053E-4, 9.050914761745759E-4, 9.614900857340691E-4, 3.815478122958882E-4, -3.768913505765538E-4, -7.946745133791186E-4, -6.406709346307471E-4, -8.805530189081738E-5, 
    4.505314039847276E-4, 6.248220026463029E-4, 3.6899209418686036E-4, -9.243513793733619E-5, -4.305829732147994E-4, -4.4203308104864386E-4, -1.6499741787650413E-4, 1.793058836278036E-4, 3.573298913174901E-4, 2.7779542909195837E-4, 3.067322823691018E-5, -1.9843183519417632E-4, -2.6388911401853014E-4, -1.489856314871752E-4, 4.322504984248852E-5, 1.7605672395419093E-4, 1.7365080868827324E-4, 6.037689612816951E-5, -7.178033355968087E-5, -1.3454690089842827E-4, -1.0006422984553232E-4, -8.258659148088651E-6, 
    7.1341577759407E-5, 9.016709825391204E-5, 4.811616488886463E-5, -1.575878420452323E-5, -5.628534800592927E-5, -5.2636904285414835E-5, -1.6733101376361367E-5, 2.1458876053844004E-5, 3.724821114596087E-5, 2.598149170172758E-5, 1.3953345414609446E-6, -1.765959612435935E-5, -2.066334928992409E-5, -1.0102757314176758E-5, 3.5716869597612703E-6, 1.089486313183067E-5, 9.249282892585478E-6, 2.5458239847764294E-6, -3.334629820145936E-6, -5.02381657863727E-6, -3.038841994292752E-6, -7.268377549370801E-8, 
    1.6077764054795699E-6, 1.5244467116818205E-6, 5.784008030122593E-7, -1.7787130511403513E-7, -3.577659459539192E-7, -1.9248240664251762E-7, -2.7448753331369325E-8, 1.6838434320997926E-8, 5.184155599280385E-9, -5.037646234529052E-22];
    var const_tbl__S = [0.0065862, -0.0022838, -0.0059202, -0.0112239, -0.0169697, -0.0214685, -0.022742, -0.0189184, -0.0086407, 0.0084932, 0.0316914, 0.0588926, 0.0870663, 0.1126093, 0.1320398, 0.1425063, 0.1425063, 0.1320398, 0.1126093, 0.0870663, 0.0588926, 0.0316914, 0.0084932, -0.0086407, -0.0189184, -0.022742, -0.0214685, -0.0169697, -0.0112239, -0.0059202, -0.0022838, 0.0065862];
    var const_tbl__xa = [-0.0086492, -0.0044524, -0.0043664, -0.0030946, -3.094E-4, 0.0042348, 0.010627, 0.018809, 0.028525, 0.039333, 0.050605, 0.061655, 0.071697, 0.079997, 0.085925, 0.089013, 0.089013, 0.085925, 0.079997, 0.071697, 0.061655, 0.050605, 0.039333, 0.028525, 0.018809, 0.010627, 0.0042348, -3.094E-4, -0.0030946, -0.0043664, -0.0044524, -0.0086492];
    var const_tbl__Ya = [0.0080236, 0.001488, -0.0074204, -0.0175495, -0.0195816, -0.0075536, 0.0136434, 0.0283156, 0.020311, -0.0121801, -0.0489419, -0.0561146, -0.0078976, 0.0922184, 0.2069483, 0.2833355, 0.2833355, 0.2069483, 0.0922184, -0.0078976, -0.0561146, -0.0489419, -0.0121801, 0.020311, 0.0283156, 0.0136434, -0.0075536, -0.0195816, -0.0175495, -0.0074204, 0.001488, 0.0080236];
    
    var Ta = true;
    var Oa = 1000;
    var p = 0.125;
    var muted = false;
    var processStartTime = 0;
    var X = 0;
    var ea = 0;
    var Ka = 0;
    var F = 1;
    var Ia = 0;
    var Da = 0;
    var Ha = 0;
    var lastProcessTime = 0;
    var L = 0;
    var la = 100;
    var qa = 100;
    var Ea = 0;
    var va = 0;
    var ua = "";
    var G = [];
    var Ga = 700;
    var ca_debug2_related = "";
    var currentAudioContext;
    var scriptProcessor;
    var T;
    var currentConvolver;
    var ia;

    var D = []; // playback buffers are stored in here
    
    var ya = 1;
    
    if (currentAudioContext = document.ct) {
      currentAudioContext.sampleRate = audioSampleRate;
      actualAudioSampleRate = audioSampleRate = currentAudioContext.sampleRate;

      try {
        scriptProcessor = currentAudioContext.createScriptProcessor(4096, 0, 1);
      } catch (ex) {
        scriptProcessor = currentAudioContext.createJavaScriptNode(4096, 1, 1);
      }

      scriptProcessor.onaudioprocess = processEvent;
      this._scriptProcessor = scriptProcessor;

      currentConvolver = currentAudioContext.createConvolver();
      scriptProcessor.connect(currentConvolver);

      if (Ca) {
        T = currentAudioContext.createScriptProcessor(4096, 1, 1);
        T.onaudioprocess = Ua;
        currentConvolver.connect(T);
        T.connect(currentAudioContext.destination);
      } else {
        currentConvolver.connect(currentAudioContext.destination);
      }
      
      var channelDataChunk;
      
      if (window.sup_android) {
        playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate);
        channelDataChunk = playbackBuffer.getChannelData(0);
        channelDataChunk.set(const_tbl__S);
        D[0] = playbackBuffer;

        playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate);
        channelDataChunk = playbackBuffer.getChannelData(0);
        channelDataChunk.set(const_tbl__S);
        D[1] = playbackBuffer;

        playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate);
        channelDataChunk = playbackBuffer.getChannelData(0);
        channelDataChunk.set(const_tbl__xa);
        D[2] = playbackBuffer;

        playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate);
        channelDataChunk = playbackBuffer.getChannelData(0);
        channelDataChunk.set(const_tbl__Ya);
        D[3] = playbackBuffer;

        for (var l = 4; l <= 16; l++) {
          D[l] = D[l - 4];
        }
      } else {
        var S = Math.round(audioSampleRate / 48000);
        
        if (1 > S) {
          S = 1;
        }

        var bufferLength = 512 * S;
        var lots_of_large_tbls = [
          const_tbl__Ma, const_tbl__La, const_tbl__Na, const_tbl__Wa, const_tbl__aa, const_tbl__un, 
          const_tbl__oa, const_tbl__pa, const_tbl__Ma, const_tbl__La, const_tbl__Na, const_tbl__Xa
        ];

        for (aa = 0; aa < lots_of_large_tbls.length; aa++) {
          pa = lots_of_large_tbls[aa];
          var Q = [];
          
          for (var l = 0; l < pa.length; l++) {
            for (playbackBuffer = 0; playbackBuffer < S; playbackBuffer++) {
              Q[l * S + playbackBuffer] = pa[l];
            }
          }

          playbackBuffer = currentAudioContext.createBuffer(1, bufferLength, audioSampleRate);
          channelDataChunk = playbackBuffer.getChannelData(0);
          channelDataChunk.set(Q);
          D[aa] = playbackBuffer;
        }
      }

      currentConvolver.normalize = false;
      currentConvolver.buffer = D[0];
    } else {
      if (window.browsersupporterror) {
        window.browsersupporterror();
      }
    }

    var U;
    var Pa;
    var I;
    var za;
    Q = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
    var R = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
    var ja = 0;
    var websockStream = new WebSocket("ws://" + window.location.host + "/~~stream");
    websockStream.binaryType = "arraybuffer";
    var M = 0.0625;
    var V = 0;
    var Qa = 0;
    var ka = 0;
    var W = 1;
    var fa = 2;
    var wsMessageReceiveTime;
    var ta = 0;
    var Aa = 0;

    websockStream.onmessage = function(msgEvt) {
      var wsMessageReceiveStartTime = wsMessageReceiveTime;
      wsMessageReceiveTime = (new Date).getTime();
      ta = k;
      var a = (2 * unk_const_5731 + k - t - (wsMessageReceiveTime - processStartTime) * x / 1000) % unk_const_5731;
      var b = a;

      if (a > unk_const_5731 / 2) {
        a = 0;
      }

      if (b > unk_const_5731 / 2) {
        b -= unk_const_5731;
      }

      b /= x;
      M += (W ? 0.1 : 0.01) * (a / x - M);

      if (1000000000 > V) {
        M = p;
      }

      var d = M - p;
      a = Math.abs(1000 * d);

      if (!(500 > a)) {
        a = 500;
      }

      qa += 0.1 * (a - qa);

      if (!(0 <= Z || (L || F))) {
        if (W && 0.05 > Math.abs(d) / p) {
          W = 0;
          B = actualRemoteSampleRate / actualAudioSampleRate / (x / audioSampleRate);
          M = p;
        } else {
          if (0 > b || b > 4 * p) {
            L = 1;
          }

          if (d < 0.25 * -p || d > 0.5 * p) {
            W = 1;
          }

          if (0.01 < Math.abs(d)) {
            if (20 > fa) {
              W = 1;
            }
          }

          a = W ? 1 + 0.1 * d : 1 + 0.01 * d;
          a *= actualRemoteSampleRate / actualAudioSampleRate / (x / audioSampleRate);
          B = W ? a : B + 0.003 * (a - B);
        }
      }

      if (1.005 < B) {
        B = 1.005;
      }

      if (0.995 > B) {
        B = 0.995;
      }

      var soundAppletDebugHtml = 
        Math.round(1000 * b) + 
        " " + Math.round(1000 * p) + 
        " " + Math.round(1000 * M) + 
        " " + Math.round(1000000 * (B - 1)) + 
        " " + W + "<br>";
      soundAppletDebugHtml += Math.round(audioSampleRate) + " " + Math.round(remoteSampleRate) + " " + U;
      soundAppletDebugHtml += currentAudioContext ? " WebAudio " : " none ";
      soundAppletDebugHtml += "f" + $ + " ";
      soundAppletDebugHtml += actualAudioSampleRate.toFixed(2) + " " + actualRemoteSampleRate.toFixed(2);
      soundAppletDebugHtml += "<br>" + Ea + " " + la.toFixed(2) + " " + qa.toFixed(2) + "<br>" + G;
      document.getElementById("soundappletdebug").innerHTML = soundAppletDebugHtml;

      b = new Uint8Array(msgEvt.data);
      var unk_7165 = k;
      lastlen = b.length;

      for (var a = 0; a < b.length; a++) {
        var g = 0;
        var l = 0;

        if ((b[a] & 240) == 240) {
          smeter = 256 * (b[a] & 15) + b[a + 1];

          if (soundApplet.smetercallback) {
            soundApplet.smetercallback(10 * smeter);
          }

          a++;
        } else if (b[a] == 128) {
          ha = 0;
          
          var e;
          for (var e = 0; e <= 128; e++) {
            z[k + e] = const_tbl__Va[b[a + 1 + e]];
          }
          
          k += 128;
          
          if (k >= unk_const_5731) {
            k -= unk_const_5731;
          }
          
          a = a + 128;
          
          for (var m = 0; m <= 20; m++) {
            Q[m] = 0;
            R[m] = 0;
          }

          ja = 0;
        } else if (b[a] > 144 && b[a] < 223) {
          l = 4;
          g = 2;
          I = 14 - (b[a] >> 4);
        } else if ((b[a] & 128) != 128) {
          l = 1;
          g = 2;
        } else if (b[a] == 129) {
          var m = 256 * b[a + 1] + b[a + 2];

          if (m != remoteSampleRate) {
            remoteSampleRate = m;
            Z = k;
          }

          if (audioBroadcastChannel) {
            audioBroadcastChannel.postMessage({ 
              type: "samplerate", 
              samplerate: remoteSampleRate 
            }, "*");
          }

          if (remoteSampleRate >= 0) {
            unk__ret_by_getid = 1;
          } else {
            unk__ret_by_getid = 0;
            stopall();
          }

          a += 2;
        } else if (b[a] == 130) {
          Pa = 256 * b[a + 1] + b[a + 2];

          a += 2;
        } else if (b[a] == 131) {
          za = b[a + 1];
          var m = b[a + 1] & 15;

          if ($ & 2) {
            m += 4;
          }

          if ($ & 4) {
            m += 8;
          }

          if (m != U) {
            U = m;

            if (currentConvolver) {
              currentConvolver.buffer = D[U];
            }
          }

          a++;
        } else if (b[a] == 132) {
          ha += 128;

          for (e = 0; e <= 128; e++) {
            z[k + e] = 0;
          }

          k += 128;

          if (k >= unk_const_5731) {
            k -= unk_const_5731;
          }

          for (var m = 0; m <= 20; m++) {
            Q[m] = 0;
            R[m] = 0;
          }

          ja = 0;
        } else if (b[a] == 133) {
          d = 0x1000000 * (((b[a + 1] & 15) << 16) + (b[a + 2] << 8) + b[a + 3]) + 
                          (b[a + 4] << 16) + (b[a + 5] << 8) + b[a + 6];
          
          var e = b[a + 1] >> 4;
          
          if (soundApplet.truefreqcallback) {
            soundApplet.truefreqcallback(d, e);
          }
          
          a += 6;
        }

        if (g == 2) {
          g = 0;
          ha = 0;

          var m = (za & 16) == 16 ? 12 : 14;
          
          while (g <= 128) {
            d =  b[a + 3] & 255        | 
                (b[a + 2] & 255) << 8  | 
                (b[a + 1] & 255) << 16 | 
                (b[a + 0] & 255) << 24;
            d <<= l;
            
            var e = 0;
            
            var q = 15 - I;
            var u = Pa;

            var unk_tbl_A = [999, 999, 8, 4, 2, 1, 99, 99];

            if (d != 0) {
              while ((d & 0x80000000) == 0 && e < q) {
                d <<= 1;
                e++;
              }
            }

            if (e < q) {
              q = e;
              e++;
              d <<= 1;
            } else {
              q = d >> 24 & 255;
              e += 8;
              d <<= 8;
            }
            
            var s = 0;
            
            if (q >= unk_tbl_A[I]) {
              s++;
            }
            
            if (q >= unk_tbl_A[I - 1]) {
              s++;
            }
            
            if (s > I - 1) {
              s = I - 1;
            }
            
            var A = (d >> 16 & 0xFFFF) >> 17 - I & -1 << s;
            A += q << I - 1;
            if ((d & 1 << 32 - I + s) != 0) {
              A |= (1 << s) - 1;
              A = ~A;
            }
            
            l += e + I - s;
            while (l > 8) {
              a++;
              l -= 8;
            }

            d = 0;
            for (var e = 0; e <= 20; e++) {
              d += Q[e] * R[e];
            }

            d |= 0;
            d = d > 0 ? d >> 12 : d + 0xFFF >> 12;

            u = A * u + u / 2;
            A = u >> 4;

            for (var e = 19; e > 0; e--) {
              Q[e] += -(Q[e] >> 7) + (R[e] * A >> m);

              if (0 == e) {
                break;
              }

              R[e] = R[e - 1];
            }

            R[0] = d + u;
            d = R[0] + (ja >> 4);
            ja = (za & 16) == 16 ? 0 : ja + (R[0] << 4 >> 3);
            z[k++] = d;

            if (k >= unk_const_5731) {
              k -= unk_const_5731;
            }

            g++;
          }

          if (l == 0) {
            a--;
          }
        }
      }

      var unk_1937 = k - unk_7165;

      if (unk_1937 <= 0) {
        unk_1937 += unk_const_5731;
      }

      var unk_1870 = Math.floor(wsMessageReceiveTime - wsMessageReceiveStartTime - 
                                1000 * unk_1937 / actualRemoteSampleRate);

      if (unk_1870 < Ga) {
        if (unk_1870 > G[0]) {
          G[0] = unk_1870;
        }
      }

      if (F > 1) {
        if (wsMessageReceiveTime - wsMessageReceiveStartTime > 1000 * unk_1937 / remoteSampleRate) {
          F++;

          if (F == 2) {
            Da = wsMessageReceiveTime - Ia;
          }
        }
      }

      ka += unk_1937;
      V += 1000 * unk_1937 / remoteSampleRate;

      if (wsMessageReceiveTime < V) {
        V = wsMessageReceiveTime;
      }

      if (ka >= remoteSampleRate) {
        var m = 1000 * (ka / (V - Qa));

        if (m < 1.01 * remoteSampleRate) {
          if (m > 0.99 * remoteSampleRate) {
            actualRemoteSampleRate += (m - actualRemoteSampleRate) / fa;
          }
        }

        ka = 0;
        if (100 > fa) {
          fa++;
        }

        Qa = V;
        V = wsMessageReceiveTime;
        Aa++; // time since last telemetry message?

        if (Aa == 60) {
          Aa = 0;
          var telemetryRequest = newXMLHttpRequest();
          var endpoint = "/~~telem?sdr=" + actualRemoteSampleRate.toFixed(2) + 
                         "&play=" + actualAudioSampleRate.toFixed(2) + 
                         "&resync=" + va + "&tl=" + G + "&s=" + ua + 
                         "&t=" + p.toFixed(3) + "<br>";
          va = 0;
          ua = "";
          telemetryRequest.open("GET", endpoint, true);
          telemetryRequest.send(null);
        }
      }

      if (audioBroadcastChannel) {
        var unk_6517 = unk_7165;

        if (unk_7165 > k) {
          audioBroadcastChannel.postMessage(z.subarray(unk_7165), "*");
          unk_6517 = 0;
        }

        if (k > unk_6517) {
          audioBroadcastChannel.postMessage(z.subarray(unk_6517, k), "*");
        }
      }

      if (N_recording_related && (!Ca && !(ha > 2 * remoteSampleRate))) {
        while (unk_7165 != k) {
          ga += unk_smplrate / remoteSampleRate;

          while (1 <= ga) {
            N_recording_related.setInt16(w, z[unk_7165], true);
            w += 2;
            
            if (w >= Y) {
              var unk_8751 = new ArrayBuffer(Y);
              w = 0;
              N_recording_related = new DataView(unk_8751);
              recordedBufferData.push(unk_8751);
            }

            ga--;
          }

          unk_7165++;
          
          if (unk_7165 >= unk_const_5731) {
            unk_7165 -= unk_const_5731;
          }
        }
      }

      if (ya) {
        var audioStartButton = document.getElementById("audiostartbutton");

        if (audioStartButton) {
          audioStartButton.style.display = "suspended" === currentAudioContext.state ? "block" : "none";
        }

        if (currentAudioContext.state === "running") {
          ya = 0;
        }
      }
    };

    websockStream.onopen = function() {
      soundappletstarted();
    };

    websockStream.onclose = function() {
      for (var c = 0; c < unk_const_5731; c++) {
        z[c] = 0;
      }

      websockStream.onclose = null;
      websockStream.onmessage = null;
      websockStream = null;
    };

    this.setparam = function(c) {
      try {
        websockStream.send("GET /~~param?" + c);
      } catch (f) {}
    };

    this.smeter = function() {
      return 10 * smeter;
    };

    this.getid = function() {
      return unk__ret_by_getid;
    };

    this.mute = function(c) {
      muted = c;

      if (!N_recording_related) {
        if (!audioBroadcastChannel) {
          this.setparam("mute=" + c);
        }
      }
    };

    this.setvolume = function(c) {
      volume = c;
    };

    this.setdelay1 = function(c) {
      Oa = c;
      M = p = c / 8000;
      t = (unk_const_5731 + k - Oa) % unk_const_5731;
    };

    stopall = function() {
      if (currentAudioContext) {
        websockStream.close();
        
        scriptProcessor.onaudioprocess = null;
        scriptProcessor.disconnect();

        channelDataChunk = null;
        D = null;
        this._scriptProcessor = null;
        currentAudioContext = null;
        ia = null;
        currentConvolver = null;
        scriptProcessor = null;
        scriptProcessor.destination = null;
      } else {
        websockStream.close();
      }
    };

    this.restartaudio = function() {
      stopall();
      document.ct = new __AudioContext;
      window.prep_html5sound();
    };

    this.destroy = function() {
      stopall();
      window.soundapplet = null;
    };

    this.rec_start = function(arg1) {
      if (arg1 == undefined) {
        arg1 = 0;
      }

      Ca = arg1;
      w = 0;
      unk_smplrate = remoteSampleRate;
      
      if (arg1) {
        unk_smplrate = audioSampleRate;
      }
      
      ga = 0;
      var c = new ArrayBuffer(Y);
      N_recording_related = new DataView(c);
      recordedBufferData = [c];
      
      if (muted) {
        this.setparam("mute=0");
      }
    };

    this.rec_finish = function() {
      recordedBufferData[recordedBufferData.length - 1] = 
        recordedBufferData[recordedBufferData.length - 1].slice(0, w);
      
      N_recording_related = null;
      
      var recordedDataComplete = {};
      recordedDataComplete.wavdata = recordedBufferData;
      recordedDataComplete.len = (recordedBufferData.length - 1) * Y + w;
      recordedDataComplete.sr = unk_smplrate;

      if (!audioBroadcastChannel) {
        if (muted) {
          this.setparam("mute=1");
        }
      }

      return recordedDataComplete;
    };

    this.rec_length_kB = function() {
      return ((recordedBufferData.length - 1) * Y + w) / 1024;
    };

    this.setbcaudio = function(newChannel) {
      audioBroadcastChannel = newChannel;

      if (muted) {
        if (newChannel) {
          this.setparam("mute=0");
        }

        if (!newChannel) {
          if (!recaudio) {
            this.setparam("mute=1");
          }
        }
      }

      if (newChannel) {
        audioBroadcastChannel.postMessage({ 
          type: "samplerate", 
          samplerate: remoteSampleRate 
        }, "*");
      }
    };

    this.setstereo = function(c) {
      if (0 > c) {
        currentConvolver.disconnect();
        currentConvolver.connect(currentAudioContext.destination);
      } else {
        if (!ia) {
          ia = currentAudioContext.createChannelMerger();
          ia.connect(currentAudioContext.destination);
        }

        currentConvolver.disconnect();
        currentConvolver.connect(ia, 0, c);
      }
    };

    this.setfj = function(c) {
      $ = c;
      c = U & 3;

      if ($ & 2) {
        c += 4;
      }

      if (c != U) {
        U = c;
        if (currentConvolver) {
          currentConvolver.buffer = D[U];
        }
      }
    };

    this.audioresume = function() {
      currentAudioContext.resume();
      var audioStartButton = document.getElementById("audiostartbutton");

      if (audioStartButton) {
        audioStartButton.style.display = "none";
      }

      ya = 0;
    };
  }

  var __AudioContext = window.AudioContext || window.webkitAudioContext;
  
  if (__AudioContext) {
    if (!document.ct) {
      document.ct = new __AudioContext;
    }
    
    var tmpTestConvolver;
    
    try {
      tmpTestConvolver = document.ct.createConvolver;
    } catch (ex) {}

    if (!tmpTestConvolver) {
      document.ct = null;
      sup_webaudio = false;
    }
  }

  var Ba = 0;
  var Ca = 0;
  var unk_const_5731 = 0x8000;
  var Ra = 0;

  window.prep_html5sound = function() {
    window.soundapplet = new SoundApplet;
  };

  prep_html5sound();
})();

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