Audio output problem - using M-Audio Fasttrack

Question

I had been using Logic Express (7.2.3) without any issues until recently plugging in a mic through my M-Audio Fasttrack.
I don't remember the exact chain of events - but at some stage, the software instrument outputs were no longer audible played either through the M-Audio, with earphones attached to its output, or through the laptop.
Even after disconnecting the Fasttrack, resetting the audio driver to 'built-in-input' and rebooting Logic Express, I still can't get any audio output from the software instruments. They aren't muted and the volume is turned up. Audio output from other programmes is working fine.
Can anyone give me any tips on how I could resolve this/suggest what I might have done to screw the audio up and what I need to do to undo it?
Thanks,
Antony

Answer 1

this is actually really simple
i just had the same problem with my m-audio and called support
when you plug in the m-audio fast track mac automatically sets the input and output through the fast track. To fix this you need to create an aggregate device. heres how:
click the finder in your dock
then click applications
in applications a utilities folder should appear...click that
in applications click Audio MIDI Setup
at the very top of the computer screen where it usually says what program is open it will say Audio MIDI Setup ..next to that click Audio
then click open aggregate device editor
you need to click the + to add a device
in the aggregate device screen it should say aggregate device.
below that check the option built in output
then check the option fast track (or device your using) the one that says 2 under the IN category and 0 under the OUT category.
click done
now open logic express (reopen if already open)
then click preferences
audio
under device tab the device option needs to say aggregate device.
click apply changes
and your done!
hope it works!