Apple Logic Pro 8 - Manual (Page 336)

336 Chapter 13 Creating Your Arrangement
Merging Audio Regions
Merging audio regions is a non-destructive operation, as Logic Pro always creates a
new file for the merged audio material (sometimes called a mixdown).
This new audio file is stored (in the project folder) on your hard drive and is
automatically added to the Audio Bin. The merged region replaces the original regions.
No Mixdown Situation
If there are several regions (mono or stereo) in a row on the same track, which have
been cut out of one region with the Scissors tool, no mixdown happens. In this
situation, a single region is simply created over the entire area. This delivers the desired
result, without using any additional disk space.
Note: Logic Pro can recognize associated regions, even if there are gaps between
them. The determining factor is that the relative position of the regions in the Arrange
corresponds to the relative position of the regions in the underlying audio file.
No mixdown occurs when you try to mix two regions on tracks that are panned to
opposite sides, as the two resulting mixdown files would be identical to the original
audio files (in the areas used for the regions).
Genuine Mixdown With Clipscan
If you combine audio data (in regions) from two or more tracks, the current pan and
volume values for the individual tracks will define the pan and volume settings in the
new audio file.
If you want to combine both sides of a stereo audio file (a mono channel on each of
two tracks), first set the pan controls of the component mono sides to hard left and
hard right, respectively.
Following the digital clipping scan (Clipscan) and completion of the mixdown,
Logic Pro replaces the previously selected regions with one region that contains the
entire mixed-down audio file.
You can use the Edit > Undo function (Command-Z) to restore the original audio
regions, if desired. If you do so, you’ll be asked if you’d like to keep, or delete, the newly
created mixed audio file. If you decide to keep it, it will remain in the Audio Bin, and
can be further used and processed.
During a mixdown, the 32-Bit resolution Clipscan function ensures that the highest
possible level is maintained, without clipping.