I concur that the mouse noise and the high-pitch noise on the recordings are probably unrelated, unless you make a recording with no input and all it picks up is your mouse movement noise.

What soundcard do you have, Mick? Might you have the gain turned up on some input channel that isn't being used? Is this a SoundBlaster with 'What You Hear"?

If all else fails, consider a soundcard outside the box.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.