Thank you, so much for the quick reply!
I opened up the Tempest, found what I believed to be the cable that needs to be tucked between the two circuit boards, tucked it back in there, closed it back up.
The sound is still present, but it is slightly quieter.
I emailed DSI support. The only other time I’ve contacted them they were very prompt and helpful, so I’m sure things will be fine in the end.
Thanks, again!