I am running the above with audio out from the box into speakers. I have recorded and mixed several songs but have recently purchased the Line Mettalurgy plug ins rather than using a microphone and amplifiers to record guitars. Since the first track recorded with this, the playback of the songs (now i am putting more lines in (guitars drums vocals etc) is cutting in and out and is seriously unstable. So bad now i cant listen to the track. Please help!! When i only had drums lines bass and guitars it was fine. In some parts there are 5 lines of volcas and the same with guitars.. Is it my PC power or unstable plugins?