marcellodum/resampler

Re-sample Audio

Audio-Resampler

Simple WebAudio based resampling library.

Runs on all modern browsers which support WebAudio.

Installation

npm install audio-resampler

API

resampler = require('audio-resampler');
resampler(input, targetSampleRate, oncomplete);

input : Input audio file. This can either be a URL, a File object, or an AudioBuffer.

targetSampleRate : The target sample rate after the re-sampling process. This number is limted based on the browser implementation (usually >=3000, <=192000)

targetBitDepth : The target bit depth after the re-sampling process. This number is limted based on the browser implementation (usually >=16, <=32)

oncomplete: Callback when the resampling process is completed. The argument to this callback is an Object which supports the following methods:

getAudioBuffer : Returns the resampler AudioBuffer

getFile : Returns a ObjectURL of a WAV file created from the resampled Audio.

Example Usage

resampler = require('audio-resampler');
var URL = "https://dl.dropboxusercontent.com/u/957/audio/sine.wav"
resampler(URL, 192000, 24, function(event){
	event.getFile(function(fileEvent){
		var a = document.createElement("a");
		document.body.appendChild(a);
		a.download = "resampled.wav";
		a.style = "display: none";
		a.href = fileEvent;
		a.click();
		window.URL.revokeObjectURL(fileEvent);
		document.body.removeChild(a);
	});
});

Test

To test this repository, you can run a local server using the npm start command which serves a simple drag-and-drop interface based webpage to resampler audio files.