I have a noise problem with my speakers and my PC. I've tried everything I can think of and I still can't eliminate the noise.
Speakers (Yamaha HS7 x2) quarter inch jack to RCA to connect to M-Audio Fast Track (Audio Interface). This has USB Type B - USB Type A to plug into the computer.
Computer with noise: Windows 10, intel i5-7500 with retail fan, corsair DDR4 3200Hz 32GB RAM, Gigabyte Z270P-D3 motherboard, bought a new power supply Corsair HX750 but this did not solve the issue. Removed GPU, tried different plug sockets, changed the monitor, and changed rooms in the house. I also tried bypassing the M-Audio and using the line-out from the PC but this just made the problem worse. I have tried using small, handheld speakers and am unable to replicate this problem.
When I unplug backlit keyboard or bluetooth mouse, noise reduces. I find that moving the mouse around the screen greatly increases the noise as does pressing keys on the keyboard. When I play audio, noise increases. Noise stops if I unplug the M-Audio from computer. Very slight noise can be heard even when PC is turned off and stops when I unplug the M-Audio. I tried plugging the M-Audio into another PC and experienced the same noise. I bought a USB cable with ferrite chokes incase of electromagnetic intereference but this actually made the noise worse.
However, when I plugged the M-Audio into my 2011 MacBook Pro (High Sierra) or Windows 10 laptop, there was no noise (when on battery power and with the power supply plugged in).
If any more information is required to try and help solve this problem, let me know.