pucho812
Well-known member
doing wiring the other day in a room at work that is complete pro tools hd with icon setup. With pro tools on input and feeding it a sine wave was amazed at how much extra crap the D/A stage of the 192 was adding in the signal. Had the o-scope set up to see the input and output waves. Coming from the signal generator had a nice clean sine wave on screen that was 1K @ 1.228V. Coming out of the 192 analog had a dirty sine wave that had a lot of artifacts and noise. It was not clean at all. This with a sample rate of 44.1khz. b24 bit. As I increased the sample rate, the noise was less noticeable on the scope. At a 192khz sample rate there was still some noise in the output sine wave but not nearly as bad at 44.1 Went digital out of the 192 into Tascam mx2424 and out of the 2424 analog. At 44.1 had much improvement with the sine wave looking almost identical to the one on the input. There was no noise in the wave at all.
so I'm trying to figure out where that noise is coming from. Obviously it's has to do with the d/a part of the 192. But is it the switching supply inside the 192 inducing noise? I have noticed this before a neve vr and pro tools but never actually put it on a scope.
so I'm trying to figure out where that noise is coming from. Obviously it's has to do with the d/a part of the 192. But is it the switching supply inside the 192 inducing noise? I have noticed this before a neve vr and pro tools but never actually put it on a scope.