scyto · December 26, 2025 20:52
diff --git a/1-ct-converted-to-ma.md b/1-ct-converted-to-ma.md
diff --git a/2-asound.conf b/2-asound.conf
 root@music-server:/etc# cat asound.conf
 # Xonar (card 0, device 0): plughw:0,0
 #   ch0=z1 L, ch1=z1 R
 #   ch2=z4 L, ch3=z4 R
 #   ch4=z3 L, ch5=z3 R
 #   ch6=z2 L, ch7=z2 R
 #
 # ALC892 (card 1, device 0): plughw:1,0
 #   ch0=z5 L, ch1=z5 R
 #   ch2=z6 L, ch3=z6 R
 #   ch4=z7 L, ch5=z7 R
 #   ch6=z8 L, ch7=z8 R


 # --- Xonar Config Start ---
 # Raw hardware (MUST be type hw for dmix)
 pcm.xonar_hw_raw {
    type hw
    card 0
    device 0
 }

 # 8ch dmix per card (dmix must slave to hw)
 pcm.xonar_dmix8 {
    type dmix
    ipc_key 10240
    ipc_perm 0666
    slave {
        pcm "xonar_hw_raw"
        rate 96000
        format S32_LE
        channels 8
        period_time 0
        period_size 1024
        buffer_size 8192
    }
 }

 # Raw route (no plug here)
 pcm.zone1_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.0 1  ttable.1.1 1 }
 pcm.zone2_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.6 1  ttable.1.7 1 }
 pcm.zone3_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.4 1  ttable.1.5 1 }
 pcm.zone4_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.2 1  ttable.1.3 1 }


 # What apps open (plug does the conversion of played format to 96k/S32)
 pcm.zone1 { type plug slave.pcm "zone1_raw" }
 pcm.zone2 { type plug slave.pcm "zone2_raw" }
 pcm.zone3 { type plug slave.pcm "zone3_raw" }
 pcm.zone4 { type plug slave.pcm "zone4_raw" }
 # --- Xonar Config End ---



 # --- ALC892 Config Start ---
 # Raw hardware (MUST be type hw for dmix)
 pcm.alc892_hw_raw {
    type hw
    card 1
    device 0
 }

 # 8ch dmix per card (dmix must slave to hw)
 pcm.alc892_dmix8 {
    type dmix
    ipc_key 10241
    ipc_perm 0666
    slave {
        pcm "alc892_hw_raw"
        rate 96000
        format S32_LE
        channels 8
        period_time 0
        period_size 1024
        buffer_size 8192
    }
 }


 # Raw route (no plug here)
 pcm.zone5_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.0 1  ttable.1.1 1 }
 pcm.zone6_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.2 1  ttable.1.3 1 }
 pcm.zone7_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.4 1  ttable.1.5 1 }
 pcm.zone8_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.6 1  ttable.1.7 1 }

 # What apps open (plug does the conversion of played format to 96k/S32)
 pcm.zone5 { type plug slave.pcm "zone5_raw" }
 pcm.zone6 { type plug slave.pcm "zone6_raw" }
 pcm.zone7 { type plug slave.pcm "zone7_raw" }
 pcm.zone8 { type plug slave.pcm "zone8_raw" }
 # --- ALC892 Config End ---
diff --git a/3-operations-guide.md b/3-operations-guide.md
diff --git a/4-lr-channel-check-test-script.sh b/4-lr-channel-check-test-script.sh
 #!/usr/bin/env bash
 set -euo pipefail

 DEV="${1:-plughw:0,0}"   # Xonar: plughw:0,0 ; ALC892: plughw:1,0
 RATE=48000
 CH=8
 HOLD=10
 GAP=2
 FREQ=440
 AMP=12000

 # Define which 8ch indices represent the four stereo pairs.
 # Based on your mapping:
 # Xonar:  (0,1)=Z1  (2,3)=Z4  (4,5)=Z3  (6,7)=Z2
 # ALC892: (0,1)=Z5  (2,3)=Z6  (4,5)=Z7  (6,7)=Z8
 #
 # This script labels them Pair0..Pair3; you’ll map them to zones while listening.
 pairs=( "0 1" "2 3" "4 5" "6 7" )

 play_one_channel () {
  local hot="$1"  # which ALSA channel index (0..7) gets tone

  python3 - <<PY | aplay -q -D "$DEV" -c "$CH" -r "$RATE" -f S16_LE -t raw
 import math, sys
 rate=$RATE
 secs=$HOLD
 ch=$CH
 hot=$hot
 freq=$FREQ
 amp=$AMP

 total=int(rate*secs)
 for n in range(total):
    s=int(amp*math.sin(2*math.pi*freq*n/rate))
    frame=[0]*ch
    frame[hot]=s
    for v in frame:
        sys.stdout.buffer.write(int(v).to_bytes(2,'little',signed=True))
 PY
 }

 i=0
 for p in "${pairs[@]}"; do
  LCH=$(echo "$p" | awk '{print $1}')
  RCH=$(echo "$p" | awk '{print $2}')

  echo "=== Pair $i: LEFT channel index $LCH for ${HOLD}s on $DEV ==="
  play_one_channel "$LCH"
  sleep "$GAP"

  echo "=== Pair $i: RIGHT channel index $RCH for ${HOLD}s on $DEV ==="
  play_one_channel "$RCH"
  sleep "$GAP"

  i=$((i+1))
 done

 echo "Done."
	root@music-server:/etc# cat asound.conf
	# Xonar (card 0, device 0): plughw:0,0
	# ch0=z1 L, ch1=z1 R
	# ch2=z4 L, ch3=z4 R
	# ch4=z3 L, ch5=z3 R
	# ch6=z2 L, ch7=z2 R
	#
	# ALC892 (card 1, device 0): plughw:1,0
	# ch0=z5 L, ch1=z5 R
	# ch2=z6 L, ch3=z6 R
	# ch4=z7 L, ch5=z7 R
	# ch6=z8 L, ch7=z8 R


	# --- Xonar Config Start ---
	# Raw hardware (MUST be type hw for dmix)
	pcm.xonar_hw_raw {
	type hw
	card 0
	device 0
	}

	# 8ch dmix per card (dmix must slave to hw)
	pcm.xonar_dmix8 {
	type dmix
	ipc_key 10240
	ipc_perm 0666
	slave {
	pcm "xonar_hw_raw"
	rate 96000
	format S32_LE
	channels 8
	period_time 0
	period_size 1024
	buffer_size 8192
	}
	}

	# Raw route (no plug here)
	pcm.zone1_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.0 1 ttable.1.1 1 }
	pcm.zone2_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.6 1 ttable.1.7 1 }
	pcm.zone3_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.4 1 ttable.1.5 1 }
	pcm.zone4_raw { type route slave { pcm "xonar_dmix8"; channels 8; } ttable.0.2 1 ttable.1.3 1 }


	# What apps open (plug does the conversion of played format to 96k/S32)
	pcm.zone1 { type plug slave.pcm "zone1_raw" }
	pcm.zone2 { type plug slave.pcm "zone2_raw" }
	pcm.zone3 { type plug slave.pcm "zone3_raw" }
	pcm.zone4 { type plug slave.pcm "zone4_raw" }
	# --- Xonar Config End ---



	# --- ALC892 Config Start ---
	# Raw hardware (MUST be type hw for dmix)
	pcm.alc892_hw_raw {
	type hw
	card 1
	device 0
	}

	# 8ch dmix per card (dmix must slave to hw)
	pcm.alc892_dmix8 {
	type dmix
	ipc_key 10241
	ipc_perm 0666
	slave {
	pcm "alc892_hw_raw"
	rate 96000
	format S32_LE
	channels 8
	period_time 0
	period_size 1024
	buffer_size 8192
	}
	}


	# Raw route (no plug here)
	pcm.zone5_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.0 1 ttable.1.1 1 }
	pcm.zone6_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.2 1 ttable.1.3 1 }
	pcm.zone7_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.4 1 ttable.1.5 1 }
	pcm.zone8_raw { type route slave { pcm "alc892_dmix8"; channels 8; } ttable.0.6 1 ttable.1.7 1 }

	# What apps open (plug does the conversion of played format to 96k/S32)
	pcm.zone5 { type plug slave.pcm "zone5_raw" }
	pcm.zone6 { type plug slave.pcm "zone6_raw" }
	pcm.zone7 { type plug slave.pcm "zone7_raw" }
	pcm.zone8 { type plug slave.pcm "zone8_raw" }
	# --- ALC892 Config End ---
	#!/usr/bin/env bash
	set -euo pipefail

	DEV="${1:-plughw:0,0}" # Xonar: plughw:0,0 ; ALC892: plughw:1,0
	RATE=48000
	CH=8
	HOLD=10
	GAP=2
	FREQ=440
	AMP=12000

	# Define which 8ch indices represent the four stereo pairs.
	# Based on your mapping:
	# Xonar: (0,1)=Z1 (2,3)=Z4 (4,5)=Z3 (6,7)=Z2
	# ALC892: (0,1)=Z5 (2,3)=Z6 (4,5)=Z7 (6,7)=Z8
	#
	# This script labels them Pair0..Pair3; you’ll map them to zones while listening.
	pairs=( "0 1" "2 3" "4 5" "6 7" )

	play_one_channel () {
	local hot="$1" # which ALSA channel index (0..7) gets tone

	python3 - <<PY \| aplay -q -D "$DEV" -c "$CH" -r "$RATE" -f S16_LE -t raw
	import math, sys
	rate=$RATE
	secs=$HOLD
	ch=$CH
	hot=$hot
	freq=$FREQ
	amp=$AMP

	total=int(rate*secs)
	for n in range(total):
	s=int(ampmath.sin(2math.pifreqn/rate))
	frame=[0]*ch
	frame[hot]=s
	for v in frame:
	sys.stdout.buffer.write(int(v).to_bytes(2,'little',signed=True))
	PY
	}

	i=0
	for p in "${pairs[@]}"; do
	LCH=$(echo "$p" \| awk '{print $1}')
	RCH=$(echo "$p" \| awk '{print $2}')

	echo "=== Pair $i: LEFT channel index $LCH for ${HOLD}s on $DEV ==="
	play_one_channel "$LCH"
	sleep "$GAP"

	echo "=== Pair $i: RIGHT channel index $RCH for ${HOLD}s on $DEV ==="
	play_one_channel "$RCH"
	sleep "$GAP"

	i=$((i+1))
	done

	echo "Done."