Apple Logic Express 7 - Manual (Page 150)

150 Chapter 4 Audio in the Arrange Window
Freeze files are always rendered between the song start and end marks—it is
recommended that you check the song end mark in the Bar Ruler before starting a
Freeze process. Please note that the end mark should be adjusted to include feedback-
dependent delay repetitions or reverb tails. Empty areas (digital zero) at the end of
freeze files will automatically be removed after the Freeze process.
You can abort freeze processes by pressing Command-Period—in this scenario, the
portion of the frozen tracks that has already been rendered will remain in the freeze
files, and will be used for playback. Frozen tracks will remain silent beyond this point.
The freeze process uses 100% of available CPU power. If, for example, a track uses 40%
of the CPU for real time plug-in calculations, its freeze file will be created in two and a
half times (faster than) the realtime speed. If the original track uses 100% of the CPU
power, the freeze process will happen in (approximately) realtime—even if offline
bouncing is used.
Working With Frozen Tracks
Once a track is frozen, you cannot edit any instrument or plug-in parameters (or related
automation data). You can, however, still edit the:
• effect send levels and destinations,
• panorama parameters,
• volume, mute, and solo
of frozen tracks—including their automation data.
Whenever you try to edit “forbidden” parameters of frozen tracks, (such as plug-in
parameters that were rendered into the freeze file), Logic will display an error
message:
“Current track is frozen. Do you want to unfreeze it?”
In this situation:
• Unfreeze will deactivate the Freeze button of the track.
• The freeze file will be deleted.
Please note that the track will now use the amount of CPU processing power that it
originally required, if you enter “Play” mode.
Now,
• perform your edits,
• activate the Freeze button again, if required.
It is not possible to cut and re-arrange the freeze files in any way, nor is it possible to
mix the freeze files with their originals on a single track—you can use one or the other,
not both!