Cut and Paste audio using web audio api and wavesurfer.js

Question

I am currently trying to make a web editor allowing users to easily adjust basic settings to their audio files, as a plugin I\'ve integrated wavesurfer.js as it has a very neat

Answer 1

Reading this answer suggests you can create an empty AudioBuffer of the size of the audio segment you want to copy (size = length in seconds ⨉ sample rate), then fill its channel data with the data from the segment.

So the code might be like this:

var originalBuffer = wavesurfer.backend.buffer;
var emptySegment = wavesurfer.backend.ac.createBuffer(
    originalBuffer.numberOfChannels,
    segmentDuration * originalBuffer.sampleRate,
    originalBuffer.sampleRate
);
for (var i = 0; i < originalBuffer.numberOfChannels; i++) {
    var chanData = originalBuffer.getChannelData(i);
    var segmentChanData = emptySegment.getChannelData(i);
    for (var j = 0, len = chanData.length; j < len; j++) {
        segmentChanData[j] = chanData[j];
    }
}

emptySegment; // Here you go!
              // Not empty anymore, contains a copy of the segment!