So I got my laptop, a core 2 duo machine which will cover my live processing needs. I'm using an m-audio Fasttrack Pro sound Card which is bus powered, uses USB to operate.
When it is connected to my laptop, I can hear a high pitched noise in sound output. I bring levels all the way down, with the knob over the unit, but noise still persists. So this high pitched deep noise is there regardless of the output level.
If the computer is busy doing something, or if its refreshing the screen, the noise goes away for that instant, and when the computer becomes idle, noise comes back. If I move this browser window around, noise stops, but if I stop, noise starts.
Sometimes, it is worse when computer operates on ac adapter.
I'm using windows xp pro sp2.
I thought this was a common problem, but a search on google and this board did not givem uch results about it.
Hope you have some suggestions for me, this is so distracting.