Logic Pro 8 crashing w/ aggregate device

Question

When using an aggregate device in Logic Pro 8 (MOTU 828 mkII (primary) and Presonus FirePod), sometimes there is no audio output. I have to go into Audio Midi Setup, change the clock from 44.1kHz to 48kHz, then change it back to 44.1kHz for the audio output to work. Much of the time, when I do this, it crashes. The screen goes dark with a dialog box saying I have to restart the computer by holding down the power button. Other times, it works okay.
In contrast, if I change the audio device in Logic Pro to just the MOTU 828 (rather than the aggregate device), the audio works fine. But when I change it back to the aggregate device, no sound is output until I do the steps in the above paragraph.
Anybody else having this problem??? Any ideas are appreciated! Driving me nuts...

Answer 1

You may want to go into Audio-MIDI Setup and delete and then recreate your Aggregate Device. I did this and was able to use my Aggregate Device with LogicPro 8. My Aggregate Device was comprised of Built-In and SoundFlower (16 ch) which is, of course, different from yours, but it may be worth a try.
The thread I got this tip from is:
http://discussions.apple.com/thread.jspa?threadID=1151068&tstart=15
Hope this helps you out a bit,
Mitch