Audio keeps cutting out. Brand new iMac- Logic 9

Question

4 gigs of memory. when i play a song-- or when i record it- even at larger buffer sizes-- the audio cuts out. Only for a second though-- and when i check the recording-- it seems that the audio still got recorded-- just the output mutes out for a second. memory thing maybe? i've tried playing around w/ buffer sizes. i'm only ever recording 1 track at a time. could it be b/c i'm recording to a usb hard drive?
thank you

Answer 1

Plugging your devices to different corners of your room can cause audio problems I illustrated in my previous post. Let's summarize everything:
1. You have to have all your devices plugged in one source which means one plate or one socket (with a divider, of course) to avoid 'brrrrrrr' in your speakers (sorry, I don't remember the word for 'brrrrr')
2. Try your setup in another roon, house, or even part of your town/city to check the audio interface itself.
!!!! Something came to my mind, perhaps you can just plug the audio interface to another firewire port on your computer? Do you have anything else connected to your firewire port? Sometimes it can be a problem! Even if it's in another port (not daisy chained).!