Apple Logic Pro 7 - Manual (Page 198)

198 Chapter 4 Audio in the Arrange Window
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 and surround 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!
It is also not possible to record audio on frozen tracks. In fact, the Record button will be
hidden when a track is frozen.