I've been trying to figure out why filtering an AudioStream and putting the result into a looping AudioChannel was creating clicks in the filtered audio. I would seem that when the filter is applied to a chunk of samples the signal is faded in. Is this something that was written into the filter class or is it inherent to digital filters?

I was trying someting similar. The idea was to make a filter that reacts on the movement of the mouse.

But try it out and the sound starts to click and then a distorted sound...

The sample is a very small loop of 0.7s, 44kHz, stereo.

Cheers,

Michiel


import krister.Ess.*;

AudioChannel myChannel;
HighPass myHighPass;

void setup() {
 size(256,200);
 rectMode(CENTER);
 noStroke();
 fill(256,256,256,200);

 Ess.start(this);

 myChannel=new AudioChannel("../cut.wav");
 myChannel.play(Ess.FOREVER);
}

void draw() {
 background(70,70,70);
 rect(mouseX,mouseY,10,10);
}

void mouseMoved(){
 myHighPass=new HighPass(mouseX,-20,19);
 myHighPass.filter(myChannel);
}

public void stop() {
 Ess.stop();
 super.stop();
}