Apple Logic Pro 7 (TDM Guide) - Manual (Page 29)

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Audio Export and Import
Logic has the ability to export and import song contents
using the OMF and AAF file formats.
Typically, the OMF (Open Media Framework, also known as OMFI—Open Media
Framework Interchange) or AAF (Advanced Authoring Format) formats are used for
data exchange with Digidesign ProTools software. The OMF file format only support the
exchange of audio data (audio media and the usage of this audio media in a project)—
MIDI and automation data will simply be ignored when using the export functions.
OMF Export
To export the current song as an OMF file, select File > Export > Export Song as OMF File.
This will launch a dialog that displays the following options:
OMF File Version
This allows you to export the file in OMF Version 1 or Version 2 format. You will usually
choose Version 2 here. Version 1 is only useful for backwards compatibility with older
software versions.
Include Audio
If this box is checked, all exported audio files will be integrated into the OMF file itself.
Note: Although this can result in a very large file, and can make file export times
lengthy, we recommend to activate this option.
If unchecked, only file references are written to the OMF file. If this method is used and
you wish to copy the OMF file to another hard disk, you need to ensure that all
referenced audio files are also copied.
Convert interleaved to split stereo
As some applications don’t support interleaved stereo files, Logic can convert
interleaved stereo files to split stereo (useful when exporting an OMF file for a ProTools
session, for example). Check this box if this is the desired behavior. Note that this only
works if the Include Audio option is checked (recommended).