Lisa,
If you would like an AIFF File, you can export from FCP.
Drop your 4 chans. of .wav audio onto an FCP sequence.
Go to Sequence settings, right hand tab is Audio settings.
Select 4 channels and then click to make them dual mono.
close sequence settings.
On you sequence, control click the on/off button on audio track 1, select Audio Outputs 1. Control click the on/off button on audio track 2, select Audio Outputs 2. and so on for 3 and 4.
Now that the outputs are properly assigned you can Export and choose “Export to AIFFs” This should give you 4 tracks of AIFF audio.
Jim P.
Pillar To Post
http://www.pillartopostvideo.com