I am using MOTU AudioDesk software (until I upgrade to DP) and my interface is
a MOTU 828mkII, which has an S/PDIF input and output. I have a Soundcraft
Spirit M8 mixer left over from my old recording rig which has an S/PDIF output
which is a stereo Mix Output.

The MOTU 828 has only two XLR inputs, and since I will occasionally like to use
the Soundcraft as a submix for recording drum kits, I thought I would take
advantage of the situation by buying a Monster Cable S/PDIF cable and
connecting the Soundcraft S/PDIF output to the MOTU 828's input.

I tested the connection by patching the stereo ANALOG outputs of my old Korg
D16 into the PB (playback) inputs on the Soundcraft mixer and then recording
the Korg's playback into the AudioDesk software. I recorded onto a single
STEREO track in AudioDesk.

It worked fine...BUT...when I listened back to the recording I made in
AudioDesk, I noticed that in the right channel only there is this half-second
burst of white noise that occurs approximately every 5 seconds!!! The left
channel audio is perfect. (Actually, the right channel audio sound great, too,
except for the white noise bursts.)

What could be the problem? It can't be some weird clock issue, since I used
the analog outputs of the Korg. Why would I have perfect audio on the left
channel but these weird blasts of white noise in the right channel? Any help
with this will be MUCH appreciated!