I am using ableton, and it's weird... I am not hooked up to any monitors, playing it through my ear buds, using the CPU and no external sound card.

but when a note is played it sounds fine as long as it is producing sound, but once the sound is played and waveform dips down again there is a noticeable sandy sound. It's not crystal clear. it sounds like a little fuzz.

Has this ever happened to anyone? Is it normal? I'd like to get rid of it.