moutend

import Foundation

extension String {
  func trimPrefix(_ prefix: String) -> String {
    guard self.hasPrefix(prefix) else {
      return self
    }

    return String(self.dropFirst(prefix.count))
  }

moutend

Usage

$ swift main.swift
Default output device: MacBook Pro Speakers

moutend

import Foundation
import Darwin

class A: NSObject {
    var task = Process()

    var slaveFile: FileHandle?
    var masterFile: FileHandle?

    override init() {

moutend

[Swift] Equalizing Audio Signal with vDSP.Biquad

This script reads /tmp/input.wav, applies the low-pass filter, and writes the modified signal as /tmp/output.wav.

To run, open Terminal.app and hit the following command:

$ swift main.swift

moutend

This script reads /tmp/input.wav and writes the copy of input as /tmp/output.wav.

$ swift main.swift

moutend

Save UInt8 array as a file

$ swift write1.swift
$ xxd /path/to/file
00000000: 1234 5678                                .4Vx

The write1.swift is a most easy way. You can also implement your own write() method like the write2.swift.

moutend

import AVFoundation

func readWavFile(_ path: String) -> [[Int16]]? {
    guard let url = URL(string: path) else {
        return nil
    }
    guard let audio = try? AVAudioFile(forReading: url, commonFormat: .pcmFormatInt16, interleaved: false) else {
        return nil
    }
    guard let buffer = AVAudioPCMBuffer(pcmFormat: audio.processingFormat, frameCapacity: AVAudioFrameCount(audio.length)) else {

moutend

import Foundation

struct Complex64 {
    var real: Float
    var imag: Float

    init(_ r: Float, _ i: Float) {
        self.real = r
        self.imag = i
    }

moutend

視覚に障害がある方のためのZen Go Synergy Coreマニュアル

Antelope AudioのUSBオーディオインターフェース、Zen Go Synergy Coreの使い方をまとめました。

注意

これは非公式なマニュアルです。内容の正確さについては保証しません。公式マニュアル（PDF）は以下を参照してください。

• English
• Japanese

moutend

Piano Key Frequencies

$ ruby piano_frequency.rb

You got the table of piano key frequencies in TSV format.

NOTE	FREQUENCY