… i still hear an annoying sound and it seems to be like that for all the presets. can somebody help me please?
thanks! 
hmm.. ?
grounding issue?
is the sound on both HP-out and main out?
cheers
christoph
i feel stupid but i found the problem. i plugged the sp in the guitar in of the soundcard and it gives me the sound but when i plug it into the line in it’s fine. but i still don’t understand why it does that. it’s my first analogue synth so it’s new to me hehe. it means also that i need to change my soundcard cause i don’t have enough line i/o.
but thanks alot for your answer. actually your answer made me compare the different inputs