Hey all, I've been getting this noise out of my set top box, desktop and laptop audio outs into my mixer. I've also tried using usb soundcards out ($5 from ebay) and they don't eliminate the problem. I thought I had it figured the other day but then it came back.
So I'm really at a dead end, so I'm wondering if someone can quickly identify what this could be. Ground loop (although it's not really a hum) or otherwise? It's not ambient microphone noise however as I have unplugged the microphone and it remains.
I've also tried equing it out, but it's basically right in the middle and high bass, so it really cuts out from the audio if I play it through the mixer if I turn down the appropriate frequency groups. I've also tried entering the actual frequency numbers, but it was too much work for not enough return. So I just want to remove the sound.