ilambda / lsdj-wave-cruncher Goto Github PK
View Code? Open in Web Editor NEWTurns a sound clip into a LSDJ wavetable synth.
License: MIT License
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Auto-detect wav frequency
I just tested this and it seems doable to add a method to auto-detect the frequency of a wav file. This was the code I used and it requires fs, node-wav, and pitchfinder
const fs = require("fs");
const wav = require("node-wav");
const Pitchfinder = require("pitchfinder");
// see below for optional constructor parameters.
const detectPitch = new Pitchfinder.YIN();
const buffer = fs.readFileSync("PATH_TO_WAV");
const decoded = wav.decode(buffer); // get audio data from file using `wav-decoder`
const float32Array = decoded.channelData[0]; // get a single channel of sound
const pitch = detectPitch(float32Array); // null if pitch cannot be identified
console.log("Frequency detected: " + parseFloat(pitch) + " Hz")
Create a unix-friendly bin
The API should be installable using npm and runnable as a command line :
$ lsdjcrunch crunch ...options
$ lsdjcrunch patch ...options
$ lsdjcrunch crunch-patch ...options
$ lsdjcrunch export ...optionsAlso, commands should have a --output or -o option for the output file. If not provided, the output file should be piped to stdout
const output = (file: Stream, options) {
file
.pipe(options.output ? fs.createWriteStream(options.output) : process.stdout)
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