I'm wondering if anyone out there has seen this problem.

I'm getting serious pops and stumbles of audio on RT in BIAB2009Win on a MacBook Pro (under Fusion or in a Bootcamp Windows XP Home) when my audio output is USB interface to a Roland SonicCell. Audio using the internal circuitry or a FireWire interface works fine.

What's strange is that CPU and RAM both have plenty of room to spare. The noise gets worse with time. I called Apple and they blame Microsoft (duh). I also get it whether using MME or ASIO. I've tried bumping up the buffer, but then my timing is insanely out of sync (and I still get the noise).

The noise sounds like loud pop and crackles, and the whole song starts to stumble (yet, CPU remains low).

I talked with Roland about this and they suggested that it sounds like the sample rate is too high; supposed to be no higher than 44.1k/16bit.

Any ideas?

(BTW, please no suggestions to change to the BB2009Mac; I'm sticking with the Win version for now.)