[sdiy] (OT) Preventing digital noise in audio out of a "2 PCs -> 1 audio amp" with USB box

[mskala at ansuz.sooke.bc.ca]

On Sun, 19 Mar 2017, sleepy_dog at gmx.de wrote:
> All audio jacks are screwed into the metal case rather close to each other, so
> I guess there should be very direct GND paths between those? They would
> certainly not have to go through "USB territory", judging from my naive
> understanding of such things.

What happens if you connect the audio through the box and not the USB
(just make a USB connection through a separate cable)?  Checking that
could verify whether the noise is really coming from the USB connection or
from something else.

-- 
Matthew Skala
mskala at ansuz.sooke.bc.ca                 People before principles.
http://ansuz.sooke.bc.ca/