I've been using Pure Data for about a year now. I originally installed in order to do some effects processing for my guitar but it took a while to get all the right hardware. Unfortunately I'm having trouble sending the signal back out of my laptop (new MacBook Pro) to my amp, and when i do manage it theres some serious crunchiness. Im using a Behringer Xenyx Q802 USB as a mixer and as an interface to send the guitar signal to the laptop. Is this wrong, or am i just missing some Pure Data setting? I've searched for forever but couldn't find a solution so any help would be very much appreciated.