reverse (copy of) webaudio buffer

gistfile1.js

request.onload = function () {
	context.decodeAudioData(request.response, function (buf) {
		// store as forward buffer
		buffer = buf;
		// create a reversed copy
		bufferReversed = context.createBuffer(buf.numberOfChannels, buf.length, buf.sampleRate);
		for (var i = 0; i < buf.numberOfChannels; i++)
			bufferReversed.getChannelData(i).set(
				Array.prototype.reverse.call(new Float32Array(buf.getChannelData(i)))
			);
	});
};