--- In logic-users@yahoogroups.com, james page <jimmymio@y...> wrote: > I noticed one guy who > recommended that you disconnect the Mac internal audio > out from your mixing board. Apple's built-in audio i/o has always been fairly prone to grounding-related issues. Some models have fared better than others over the years, but I have noticed a progressive increase in the susceptibility to power- USB- or video-related interference of the built-in audio over the last few years. I'm glad they appear to be moving to an optical digital connection (shame it can't do ADAT!), I hope it appears on powerbooks soon. I doubt this is the whole issue though - it sounds like some users are experiencing problems resulting from poorly designed powering or grounding of the firewire bus as well, with leakage from the power supply, USB, video, etc. This sort of thing can be a nightmare to sort out. John Pitcairn ------------------------------------------------------------- Logic Control emulation for generic midi controllers: LC Xmu demo: http://www.opuslocus.com/lcxmu/ -------------------------------------------------------------