I have had similar experience with a certain setup. It had on-board sound and speakers build into the monitor. As soon as PD started it generated som kind of weak buzzing sound (like static) which changed if i held down a mouse button. I believe that the culprit was either the drivers or the soundcard. On that computer I could also hear modem traffic, btw (very faint though). I have only experienced it on this single machine.
I don't thing PD is actually _generating_ the buzzing sound.
/Soeren
Let me explain: I'm currently using the onboard soundcard (ASUS
motherboard with a c-media audiocard). I don't experience any unwanted noise when I use Cool Edit Pro, Windows Media Player, etc. for wave playback. But the instant that I open PD...i get noise! (a buzz and a hum somewhere around 800 hz). I close PD, the noise goes away. I open PD, the noise comes back.
Is PD generating this buzz? or are the drivers? or is the c-media DSP?