A Moogle  🏳️‍🌈 💻 🎮 🎶 🇸🇪

Looking for help for an audio engineer. My machine picks up this interference whenever I'm recording on my Blue Yeti mic. http://polygonal-moogle.com/debug/interference.wav … - WARNING: Volume. I had to apply a maximization filter. Damned if I know what it is. (1/2)

I've pulled the batteries from my phone, wireless keyboard, and mouse. Still happens. I've pulled my phone's wireless charging station. Still happens. The Yeti has an on-board DAC and a USB link. USB is supposed to be a digital protocol. So how does it get audio interference?

Moreover, the Blue Yeti has a button that enables you to hear through your 'phones what the mic is picking up. When I have that enabled, there's no audible interference. So it has to be something between that and when the PC Rx's the data.

Sorry for the potentially stupid question, but how would I go about isolating the USB cable's power lines specifically? I just made an interesting discovery: When I have local-loopback mode enabled on the mic, I don't hear the intereference... *unless* I am recording.

Retain ground or even give it a better ground if you can find one on the computer. But cut the 5V line on a USB cable, then give the mic it's own, clean, 5V power supply (as long as you common the ground). Or better/safer still use a USB opto-isolator: https://www.amazon.co.uk/ARCELI-Isolator-Eliminator-Industrial-Protection/dp/B07SJD86TD/ref=pd_day0_107_2/260-5666511-6544418?_encoding=UTF8&pd_rd_i=B07SJD86TD&pd_rd_r=34df9df6-c3cb-4221-8fe4-f27f03724b9c&pd_rd_w=MX8io&pd_rd_wg=pMGQe&pf_rd_p=0b62e924-7a6d-4dbc-bf05-0cc3bd2ad828&pf_rd_r=6KZ1QTYB1W1ERXDJH819&psc=1&refRID=6KZ1QTYB1W1ERXDJH819 …