I recently got an external USB DAC and some good quality desktop speakers, but have been having some issues with noise. Both low pitched "hum" and high pitched digital noise which corresponds to disk activity, things redrawing on screen and even mouse movements. It's very annoying... I'm lead to believe this problem is down to a ground loop.
From my testing, I believe the issue is somewhere in the PC itself. I've gone as far as disconnecting all external items (all USB and display cables) just in case one of those is the cause, but got no improvement.
I have tried switching over the DAC to an old backup desktop (self built) - no problem
I have tried switching it over to an Apple Macbook - no problem
But if I plug it back into the computer I want to use it with, immediately the noise returns.
I've checked all internal connections, replaced power lead, but all with no improvement.
The specs are as follows:
Corsair 200R Case
Gigabyte Z97X-Gaming 3 motherboard
256 Gb Sandisk Ultra+ SSD
2 Tb & 1 Tb additional drives
XFX 650XTR PSU
Arcam rPAC DAC
M-Audio BX5 D2 speakers
So my question is any ideas on how to solve an issue like this?
EDIT - sorry this should really be in hardware - it's not a software problem!
Edited by jonuk76, 03 January 2016 - 08:31 AM.