Apple Logic Pro X - Manual (Page 463)

Chapter 15 Advanced edit features 463
Audio File Editor Reverse commands
The Reverse command is most commonly used on an entire audio file—to reverse a cymbal
sound, for example. It can also be used as a creative option on selected portions of audio files.
For example, the reverb tail at the end of a file can be reversed, copied, and pasted to the
beginning of the file.
The Invert command is useful for correcting phase cancellation errors, or when several out-of-
tune signals (or several signals processed through chorus effects) are to be mixed down to mono.
Tip: You can also use the Invert function to decode mono/stereo recordings, but it’s easier to use
the Direction Mixer plug-in for this task. For more information about this plug-in, see Logic Pro
Effects Help.
Reverse the selected area of an audio file
m Choose Functions > Reverse from the Audio File Editor menu bar (default key
command: Shift-Control-R).
Reverse the phase of all selected audio material
m Choose Functions > Invert from the Audio File Editor menu bar (or use the corresponding key
command).
All negative amplitude values become positive, and vice versa.
Note: This doesn’t audibly change the file, if heard in isolation.
Audio File Editor Loop commands
The Audio File Editor Loop commands, available from the Edit menu, are ideal for use with the
EXS24 mkII sampler. For details about the EXS24 mkII, see Logic Pro Instruments Help.
You can also use these functions to generate audio files that contain the loop settings in the file
header. This allows you to make full use of these files in any application that can read the loop
information in the file header.
Use the Audio File Editor Loop commands
1 Choose either of the following commands from the Edit menu:
•
Sample Loop → Selection: The loop area (defined by the loop start and end points) is used to
select a portion of the overall audio file.
•
Selection → Sample Loop: The selected area is used to set the loop start and end points.
2 Choose Edit > Write Sample Loop to Audio File.
The new loop values are written to the file header.