I tried using Room EQ Wizard to test hardwaretwice. The first time was my desktop PC at work, I ran a 1/8" patch cable from the headphone out to the mic input. I got a flat frequency response, but a decent amount of harmonic distortion, which made sense (to me).
The curious thing though was when I tried doing the same with my interface. This time there was much less distortion, but the frequency response wasn't flat (to a db or so). Could that have something to do with timing? (Or maybe the interface being on it's way out?; two channels have died already, but the input I was using seemed to be working fine)
I'm planning to do another test with a regular sine sweep and seeing if it comes out flat.
But yeah, is REW a decent tool for measuring frequency response and THD of hardware?
Edited by musichascolors (03/31/16 10:44 AM)