reversebuffer

Returns a reverse buffer of AudioBuffer from an original AudioBuffer.

A reverse buffer mimics a "backward" playback of an audio source when it is being played forward normally.

This tiny library uses Web Audio API.

Usage:

var reversebuffer = require("reversebuffer");

var audioContext = new AudioContext();

// Make an AudioBuffer or get decode it from a file.
var bufferSource = audioContext.createBuffer();

// In turn returns a reversed AudioBuffer
var revBuffer = reversebuffer({
    buffer: bufferSource,
    context: audioContext
});

Use with WebAudioLoader

WebAudioLoader deals with loading an audiofile over an url or FileObject and returns an AudioBuffer.

var WebAudioLoader = require("webaudioloader");
var reversebuffer = require("reversebuffer");

var audioContext = new AudioContext();

var originalBuffer = null;

var wal = new WebAudioLoader({
    context: audioContext,
    cache: true,
    onprogress: function (evt){
        console.log("loading soundfiles", evt);
    }
});

// Load a dummy audiofile

wal.load("http://yourdomain.com/youraudiofilename.mp3", {
    onload: function(err, buffer){
        if(!err){
            originalBuffer = buffer;
        }
    }
});

var reverseBuffer = reversebuffer({
    buffer: originalBuffer,
    context: audioContext
});

Install

1. npm

   npm install --save-dev reversebuffer

2. Using browserify

   var reversebuffer = require("reversebuffer");

3. Standalone (global object, AMD) builds are here

API

var revBuffer = reversebuffer(options);

• option object have this arguments
  • buffer: AudioBuffer - buffer source to be reversed
  • context: AudioContext - an AudioContext to use for decoding the audio
• returns an AudioBuffer which is reversed.

var revBuffer = reversebuffer(audioBuffer);

• buffer: AudioBuffer - buffer source to be reversed
• returns an AudioBuffer which is reversed.

License

MIT