Hi, I used to use Sonar LE with a Gtrack Samson USB mike, all was ok really. Recently I decided to upgrade to Sonar professional and have started the free trial with a view to buying it. After quite a few config problems its sort of working but there is a huge amount of "hissing" in the background of every recording, which I didn't have on the old system. Has anyone any clues as to what I've done wrong? Obviously its a long time since I got the early system and I'm struggling to get up to speed here!