When the audio data is too long, it will throw an exception: Maximum call stack size exceeded.

[zoooooway]

The code that produces abnormalities is as follows:

  _.build= function(data) {
    header.blockAlign = (header.numChannels * header.bitsPerSample) >> 3;
    header.byteRate = header.blockAlign * header.sampleRate;
    header.subChunk2Size = data.length * (header.bitsPerSample >> 3);
    header.chunkSize = 36 + header.subChunk2Size;

    _.wav = header.chunkId.concat(
        u32ToArray(header.chunkSize),
        header.format,
        header.subChunk1Id,
        u32ToArray(header.subChunk1Size),
        u16ToArray(header.audioFormat),
        u16ToArray(header.numChannels),
        u32ToArray(header.sampleRate),
        u32ToArray(header.byteRate),
        u16ToArray(header.blockAlign),
        u16ToArray(header.bitsPerSample),    
        header.subChunk2Id,
        u32ToArray(header.subChunk2Size),
        (header.bitsPerSample == 16) ? data : data
        );
    _.dataURI = 'data:audio/wav;base64,'+ btoa(String.fromCharCode.apply(String, _.wav)); // will throw error
  };