Hi, I've a M-audio quattro sound card. It work fine with PD , but under Windows XP I cannot to obtain a latency below 58 ms. I have set the asio, audiobuf and blocksize switch, and very low in latency windows in Quattro control panel : i.e pd -asio -sounddev2 -channels 4 -audiobuf 12 -blocksize 16 (these are the smaller value I can set) Someone have a better result? Ciao Claudio