Is there a way to check if an interface for distortion? My MOTU Ultralite mk5 is making me think it's clipping both at the pres and the line inputs. Tests of feeding different signals to both, with different mics and external pres are, sadly, inconclusive to my fear that I might have a bum unit. I'll feel good about it and then do some recording and there's crunchiness as if it was recorded too hot, but the pre was low and it went in at -15. Swapped mics, cables as well.
Are there any tests one can do for an interface's distortion that can be done with tones and software as opposed to a additional piece of measuring gear?
Thanks