Questions & Answers

Interference issue, PC + Eris E3.5 = no noise, PC + Sub8 + E3.5 = noise from mouse?

0 votes
556 views
asked Feb 20, 2023 in Sceptre, Eris, R-Series by przyklenk (120 points)
Hunting some noise gremlins in my setup.

PC USB audo card (soundblaster g1) via 3.5mm to RCA to Eris E3.5 = no problem, very clean

PC USB audio card (soundblaster g1) via 3.5mm to Sub8 to Eris E3.5 via RCA cable = electrical noise made worse by mouse movement?

Tried a few different cables, isolating power and input device cables, even ferrite cores (desperation)... no difference.  USB bus/motherboard to blame?  Maybe the RCA cable?  Switch to TRS between Sub and E3.5s?

2 Answers

0 votes
answered Feb 21, 2023 by mattbennett1 (4,080 points)
Get an external/better audio interface so you can connect your speakers with balanced cables. Cheap PC audio cards are notorious for this noise problem when moving the mouse around, or when the CPU or GPU is processing. Or just buy a Mac.
0 votes
answered Jun 16, 2023 by XSNoyz (140 points)
I am in the exact same situation with an Eris 4.5 Bt and a PC (Minisforum UM590). I have debugged until I am blue in the face. I'll spare you the details of all the trials and errors with the Mackie board (I thought that might be the problem) but ultimately did the simplest test of all. I connected a 3.5 stereo to 3.5 stereo directly from the UM590 to the Sonus Aux In. I still get that electrical, 60Hx pulsating static. Please note that I have eight other computers in the room and this is the only computer causing the problem so it must be the computer itself, but why only with the Sonus? If I plug a headphone into the PC, all is good. If I plug the PC into my Mackie and then go to other speakers, all good. But the PC and the speakers directly (or through the Mackie) and I get the electrical interference. Going nuts.
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