Apple Logic Express 7 - Manual (Page 135)

Chapter 4 Audio in the Arrange Window 135
Editing Regions
Dividing Regions
When you divide a Region using the Scissors tool, you create two new Regions. The
newly created segments of the Region are named after the original, with a sequential
number appended to the end of the name.
Region Display
The Arrange window displays the actual waveform of an audio file, all the way down to
single sample resolution (at higher zoom levels). The Waveform vertical zoom key
commands make this feature even more useful; for precise Arrange edit operations,
and for operations on audio Regions with low signal levels.
Resolution
When selecting a cut point with the Scissors tool, you can move backwards and
forwards in steps of one division. If you need a finer resolution, press Control after you
have selected the Region with the Scissors. To obtain the maximum resolution (ticks)
press Shift, as well.
On Zero Crossings
If Edit > Search Zero Crossings is switched on in the Audio window, the division-point is
moved to the nearest position that the waveform crosses the zero amplitude axis.
When enabled, this also applies to all other methods of altering the start or endpoint of
a Region in the Arrange window.
Note: This can cause the precise startpoint and length of a Region to differ slightly
from the selected value. In most cases, this will be inaudible.
Erasing Regions
Regions can be erased by either; selecting them and pressing Backspace, or by clicking
on them with the Eraser tool.
Erasing Recordings
When you erase a Region that you have just recorded (since opening the song), Logic
will ask if you also want to erase the corresponding audio file. This is a good way to
avoid wasting hard drive space unnecessarily by retaining bad takes and unwanted
recordings.
If the recording was made before the song was loaded for the current session, this
dialog box will not appear. This prevents you from accidentally deleting valuable
recordings. Pressing Backspace will only remove the Region from the Arrange area. If
you want to delete the corresponding audio file from the hard disk, you can do so by
selecting Audio File > Delete File(s) in the Audio window.