Apple Soundtrack Pro 3 - Manual (Page 456)

For example, by default, all tracks are routed to Submix 1, and Submix 1 is routed to the
Stereo 1, 2 outputs. With this setup, selecting the “Export multiple mono files” checkbox
exports two mono files. The letter L is appended to the filename of the left mono file,
and the letter R is appended to the right mono file.
If the Output pop-up menu is set to Surround >1-6, six mono files are exported, each
with the corresponding code appended to its filename: L, R, C, LFE, Ls, and Rs.
For more information about routing to hardware output jacks, see Connecting Physical
Outputs and Setting the Submix Outputs to Surround .
Exporting to AAF
Advanced Authoring Format (AAF) is an industry-standard project interchange format
for sharing projects and editing decisions between different video and audio editing
applications. For more information on using AAF files, see
Exchanging OMF and AAF Files
with Other Applications .
456 Chapter 20 Exporting Multitrack Projects