So almost a year ago I moved across the country for grad school, studying screen scoring. I was subletting at my old place and just moved into a new apartment a month ago—cheaper rent, but also with a third bedroom that is serving as a dedicated office/studio space. Bought a new desk that's big enough for my gear, inherited my roommate's old monitor, and all of a sudden I have a pretty fantastic setup. Problem is, I've got some kind of electrical interference and I'm both trying to troubleshoot it and eliminate it.
Current setup is my MBP, drawing power from my Anker PowerExpand Elite 13-in-1 dock, to which my Scarlett 2i4 first gen is also connected. The Focusrite is outputting the sound to my Mackie Big Knob Studio because I needed my monitors to also work for my stage piano and my girlfriend's computer when she needs to use the workspace. (She just uses the USB connection from the Big Knob.) Using headphones on the Focusrite, I don't have the issue. If I use the Big Knob as my audio interface, the problem is almost entirely gone (really gotta crank up the signal to a level I'd never practically use in order to hear any interference or noise). If I connect the Focusrite to a different USB hub running off the other Thunderbolt bus, the problem decreases, but remains. I know I've got some redundancy in my setup, but I do plan on investing in a better interface within the next year to replace my old FireWire Duet, so this will ultimately be my setup. Any input on how I can figure out how to eliminate the issue? Thanks!
[ 2019 16” MBP: 2.3 GHz 8-Core, 64 GB RAM, 2 TB; OS X.15.7; LP X.5.1.
Early-'08 Mac Pro (3,1): 2.8 GHz 8-Core, 16 GB RAM; OS 10.11.6; Logic X.3.3. ]