I am currently using amplitube hendrix but I think I have ran into a problem. You see, sometimes I would be playing guitar with my headphones and all of a sudden there is a LOUD noise (hiss) that literally almost blew my ears out. The hiss sounds like back in the old days when using analog tv in ch.3 used to make, remember that? Well for some reason it got loud, pretty much maxed out the volume and I had to quickly exit amplitube. It has happened a few times already. I'm using a mac book pro, its more than capable to run this thing too. I'm using sample rate of 4800 and buffer size of 256. Any help guys? Im also using Behringer UCG 102 to plug into the computer.