I'm reading about custom audio effects with web audio:
http://www.html5rocks.com/en/tutorials/casestudies/jamwithchrome-audio/
An example they give is this delay loop
var SlapbackDelayNode = function(){
//create the nodes we’ll use
this.input = audioContext.createGainNode();
var output = audioContext.createGainNode(),
delay = audioContext.createDelayNode(),
feedback = audioContext.createGainNode(),
wetLevel = audioContext.createGainNode();
//set some decent values
delay.delayTime.value = 0.15; //150 ms delay
feedback.gain.value = 0.25;
wetLevel.gain.value = 0.25;
//set up the routing
this.input.connect(delay);
this.input.connect(output);
delay.connect(feedback);
delay.connect(wetLevel);
feedback.connect(delay);
wetLevel.connect(output);
this.connect = function(target){
output.connect(target);
};
};
My question is this:
Is there any compelling reason to have the output gain node? Wondering if it's there for educational reasons, or if it is actually serving a purpose which I've not grasped.
You could directly connect the wetLevel node to the target, and that would save you having to create the output node.
this.connect = function(target){
wetLevel.connect(target);
};