> My 2ghz G5 has a PCI-424 connected to a 2408mk3 and I'm experiencing > low level crackling every 10 seconds or so. I'm on internal clock > with no extenal devices playing string triads from an EXS-24 > instrument. I've changed audiowire cables and swapped PCI slots but > I still have the crackle. MOTU thinks its a PCI bus issue. Is there > a way to allocate recources on a Mac the way you might change an IRQ > setting on a PC? Any other ideas? I'm not sure if this has any bearing on your problem or not, but I had a digital spiking issue with my MOTU 828mk2 a little while back. It turned out to be another PCI audio card (M-Audio 24/96) that was still installed albeit unused that was causing problems - apparently the Firewire connection is a subset of the PCI bus, so even though the M-Audio card was not selected in any application or the system as the primary audio card it was "getting in the way" of the MOTU. Pulling the card put everything right again, and the 828 has been a champ ever since. Do you have any other audio-related PCI cards (or any other PCI cards at all, for that matter) that you can pull to see if the problem goes away? Brian :::::::::::::::::::::::::::::::::::: Logic Audio Pro 6.4.2 PowerMac G4 933MHz OS X 10.3.4 1 GB RAM MOTU 828mkII - driver v1.09 - CueMix v1.4