Ok, so I’ve had a D10 with a Liquid Spark amp for quite some time now, it’s been great I’ve enjoyed it a lot. I recently upgraded my mic setup from a generic USB mic to a Mackie Mix8 analog mixer with 2 condenser mics I already had. This introduced quite the ground loop. With the mixer being grounded to the well, ground, and the DAC being powered by the computer, this wasn’t surprising. I was half expecting it anyways and decided to get the iFi iDefender with the iPower to power the DAC. This removed a huge chunk of it, but it left this high pitched ringing. I thought maybe it could be interference, so I threw some ferrite beads on my cables and that seemed to do the trick. It all was well and good for some amount of time. I think about a week or 2, until I noticed that when I played a youtube video, or any sound for that matter, a high pitched whine would come, then go away (quiet down significantly?) about 15 seconds after stopping whatever the source of the sound was.I’ve posted a picture of my setup, I’ll explain each line here:
Aux send to computer: This is what carries my mics, and sometimes my desktop audio to my computer. Like sometimes if people want music in a discord call, I can play Spotify and just turn up the aux knob. The way the Mix8 works is there’s an aux send, allowing any channel to be sent to the aux, allowing for routing. This is a mono 1/4" to 3.5mm cable with ferrite beads.
"Chat" audio to mixer: I push the output of things like Discord and Zoom here to my mixer. Allows me to play music without people hearing themselves. This is running off the internal Realtek chip in my computer. A 3.5mm to dual 1/4" jacks with a ferrite bead.
Mic in: 2 xlr inputs. I had two mics so figured why not use both?
" Desktop" audio: RCA output on D10. RCA to dual 1/4" with beads.
Unlabeled cable to amp: Same cable as on DAC, RCA to dual 1/4"
It’s worth noting I am running I think D10S (don’t quote me on that) or something like that instead of the D10 drivers. Someone in MassDrop comments said that and I thought I’d try it and didn’t see any problem in it. Also, for an unrelated reason, this is a fresh install of windows. So that eliminates a lot of factors as well.
I’ve for sure narrowed it down to the DAC, so it must be something with a ground loop, right? When I revert back to my old setup (computer to dac to amp) there’s no sound at all. (Which begs sort of a separate question, but why is there only a ground loop between the mixer and the dac? The mixer is plugged into the ground just as the amp is, so why isn’t there one between the amp and dac?) Anyways, I don’t think it’s drivers, I already reinstalled them. Anyways, help?
SIDENOTE: One thing I have found out is this mixer is pretty loud noise floor wise. I mean it was pretty cheap, around 80 bucks. I’ve been thinking about at some point changing over to the 802VLZ4, which is about 200 but maybe later. I already had gotten the wrong thing once, as the FX8 or whatever I got didn’t route how I wanted it to, and I didn’t want to wait around for another product when I already had to shuffle some stuff around to get where I am now. If you have any suggestions for mixers, feel free to let me know. I had just started with Mackie cus I knew about them and it wasn’t too expensive. I’m aware of the GoXLR, but I don’t want to spend 500 dollars on this. I know it’s sort of heading that way, but I’d like to avoid it if possible.