The only time that I have ever gotten a high pitched noise during a recording is when a live cell phone was near. Turning off the cell phone or moving it away from the instrument that I am recording stopped the noise.


Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware