Hi, 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? Thanks for any help I might receive. Jeff