Apple Logic Pro 9 - Manual (Page 1204)

Importing Split Channel Files
Nothing special needs to be done to import either split or interleaved files into Logic Pro.
What happens when you import such files differs slightly, depending on the audio interface
hardware in use.
• If You Are Using Core Audio Hardware in Logic Pro: When split channel files are imported,
they are automatically converted to interleaved files. If you want to add several split
channel files simultaneously, Logic Pro asks whether all files should be converted at
once.
• If You Are Using DAE/TDM Hardware in Logic Pro: When split stereo files are imported
into Logic Pro, they are used as is. Split surround files are not supported.
Working with Split Stereo Files
Logic Pro treats audio files with a name that ends in .L or .R as stereo files. This applies to
all file management functions, such as Rename, Create, or Revert to Backup. The following
list outlines how split stereo files are handled in Logic Pro:
• When you select an independent mono file (one side of a split stereo file “pair”) in the
dialog, both channels are imported. Split stereo regions are indicated by the stereo
symbol: two adjoining circles.
• You can see both files in the Audio Bin. They have the same name—apart from the
channel suffix (L and R). If you rename one channel of a split stereo audio file, the other
channel file is automatically renamed as well. This also applies when renaming regions
associated with the files.
• File edits performed in the Sample Editor apply equally to both files.
• If you use the Add Region command to create a new region, Logic Pro does this for
both audio files.
• Any alteration made to either region is automatically mirrored by the other. This applies
to region start point, end point, and anchor position changes.
• If the region of either file is moved into (or within) the Arrange area, the other region
is also moved.
Disconnecting Split Stereo Files
Both sides of a split stereo file are normally edited together. On occasion, however, you
may need to edit one side individually.
To disconnect a split stereo file
1 Select (either side of ) the split stereo file in the Audio Bin.
2 Choose Edit > Disconnect Selected Split Stereo File.
1204 Chapter 42 Working with Split Channel Audio File Formats