DigiDesign Digidesign Pro Tools 8.0, Reference Manual

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Pro Tools Reference Guide 748
Converting Samples to Ticks
When dragging a region group from a sample-
based track to a tick-based track, the length of
the region group does not change. This is be-
cause region groups are converted from samples
to ticks after they are moved into tick-based
tracks. The length of the region group only
changes with subsequent tempo changes. If ap-
propriate, change the local tempo on the tick-
based track to match the tempo of the sample-
based region group before moving a sample-
based region group to a tick-based track.
Converting Ticks to Samples
When dragging a region group from a tick-based
track to a sample-based track, the length of the
region group does not change unless it is moved
to another time location with a different tempo.
This is because region groups are converted from
ticks to samples after they are moved into the
sample-based tracks.
Multitrack Region Groups with Sample- and
Tick-Based Tracks
Multitrack region groups can include both sam-
ple-based and tick-based tracks. However,
changing the tempo separates the region group
between sample-based tracks and tick-based
tracks.
Editing Region Groups
Region groups are edited in much the same way
as regular regions: They can be named, moved,
cut, copied, pasted, trimmed, muted, locked,
and so on. However, there are a few significant
differences between editing regular regions and
region groups.
Editing MIDI Region Groups
If a MIDI region within a region group is modi-
fied in any way, a new region copy is created
and placed over of the region group. For exam-
ple, if you record, draw in a new note, edit MIDI
controller data, or quantize a Timeline selection,
a new region is created over the region group.
Editing Audio Region Groups
Certain audio editing commands create new re-
gions over region groups. To use these com-
mands and maintain the region group, ungroup
the region group, perform the edit, and then re-
group the region group.
The following edit commands create new re-
gions over region groups:
• AudioSuite processing of a grouped region re-
sults in a new region over the region group.
• Consolidating a selection of a grouped region
creates a new audio file and region over the re-
gion group.
• Recording into a region group creates a new
audio file and region over the region group.
• Pencil tool waveform redraw results in a new
region over the region group.
A multitrack region group separated across sample-
based and tick-based tracks after changing tempo