setUpReverbOnPlay = function(that, arg){
	var reverbNode = {
		interface : 'custom',
		input : context.createGain(),
		convolver : context.createConvolver(),
		wet : context.createGain(),
		output : context.createGain()
	};
	reverbNode.convolver.buffer = that.reverb.buffer;
	reverbNode.wet.gain.value   = that.reverb.wet;

	reverbNode.input.connect(reverbNode.convolver);
	reverbNode.input.connect(reverbNode.output);
	reverbNode.convolver.connect(reverbNode.wet);
	reverbNode.wet.connect(reverbNode.output);

	that.reverb.node = reverbNode;
	that.nodes.push(that.reverb.node);
}
Initialize and configure a convolver node for playback *