Read through these mails briefly, but what is your Audio Device? - Got about the same system running: x64, jbridge, i7 Asus board, but i disabled the onboard sound chip (BIOS) and the one on my AMD video card. Did that in the past for some reason like you experience now, probably with other software like Cubase. With either a focusrite, RME multiface, in the past a soundblaster ZS2 with 64 drivers, or yamaha 01v96i no crackling with latency 258. If i set latency higher i do get problems though. - F