THANK you. Some of yall got me thinking I'm really losing it here.
I get it. I know it's not exactly normal.
But... I mean, it's right there. Audible noise from inside this specific PSU transferring to
any speakers with nothing but a USB data connection between
any interface and
any machine (with
any combination of components inside
any case [or no case,] with the suspect PSU as the control,) all running off of
any circuit or combination of circuits in
any building, utilizing
any cables/cords/strips I can go between. *Phew* That's a lot of variables! I hope I didn't miss any
At this point I've gotten so efficient at all of these little testing procedures that I'd get a promotion if it was my job to do them.
It may seem like nonsense for an audible noise emanating from the PSU to translate into electrical noise, which then makes it to USB interfaces with just a data-only connection from the machine. But that's exactly what's happening. How or what's exactly happening, I don't know. But I have observed the outcome and the conditions required enough times to be sure the answer is somewhere in that specific scenario. I know... I wouldn't believe it if I wasn't stuck dealing with it. But then... experience with amplifiers and other highly-sensitive pieces of audio equipment reminds me that noise sometimes works in mysterious ways. Stranger things can happen.
Just seems like kind of a waste of everyone's time to look for other explanations when it's already long been established that noise goes away when I try another PSU. It just isn't sensible to blame anything but the PSU. Not trying to say I know better. Maybe one of you has the actual explanation, but that still wouldn't likely change the reality I'm already left with. At this point, I don't know how there could be any possible solution other than the one I've already verified will work. And it's not like I'm out that much more to swap a new PSU up a bracket, anyway. I'm happy to do that if it means not banging my head against a wall.
Don't get me wrong, I appreciate everyone's input. I post about these issues because other people often see things I can't from where I'm at. I just want to be clear where I'm at with this so that we don't keep going in circles with what is actually a very simple problem when you ignore how strange it is.
I'm still kinda debating on a few PSU's. I'm torn between a 650w Supernova G3, RM 5/6/750x (depending on price difference,) Seasonic Focus+ Gold 650w, or maybe even a Bitfenix Whisper M 550w. If anybody has others that they've owned and can recommend in that general price range, I'm all ears. Specifically interested in whether or not you ever hear any whine in whatever PSU within this range that you happen to have experience with.