Hello all, first time poster here. I recently got the Schiit Magni/Modi stack and I love the sound, but the Modi has some noise issues. It was the typical oscillating whine of a noisy motherboard. So I ordered a ADUM4160 based usb isolator (http://hifimediy.com/index.php?route=product/product&product_id=122) The oscillation I initially heard is gone, but now there is a very noticeable high pitched whine whenever music plays. The whine continues for a short time after music plays and then stops, starting up again after something else plays.
System info: (just in case)
Running off a separate usb 3.0 card (http://www.amazon.com/gp/product/B005ARQV6U/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1)
-The Noises are present on all controllers attached to system
Tested on Senn HD598 and Audio Technica Ath-ANC7b (HD598 is out for repair currently)
Is there something wrong with the isolator or is it something else? I need the wisdom of the headfiers.
I will be testing on another computer shortly.
If any of you can help, please do, I will be forever in your debt.