The mouse noise (I have it too) seems to be a common issue with the USB bus. I do not have a solution. It doesn't seem to affect anything, so I try not to stress about it, other than over the sheer inelegance.

Have you listened to your recordings on other devices to see whether the high-pitched sound is still there? If not, treat as above; the problem is likely in your monitoring system. I did have this problem and fixed it with new cables from my audio interface to my powered speakers. If yes, I can only suggest a notch filter during mastering.

HTH,

R.

Last edited by Ryszard; 08/30/12 12:09 AM.