Mixing : Basic Mixing : VCA Master Tracks : VCA Master Track Controls

VCA Master Track Controls
The controls on a VCA Master track affect the corresponding controls on the slave tracks in its assigned Mix group. VCA Master tracks have the following controls:
Volume
The VCA Volume fader controls the Volume fader on audio, Auxiliary Input, Instrument, Master Fader, and other VCA Master tracks in a VCA-controlled group. (Volume faders on MIDI tracks are not affected.) Volume faders on slave tracks move to show the composite level, or the level on each track resulting from the position of the VCA Master Volume fader.
Mute
The VCA Mute button controls the mute state of audio, Auxiliary Input, Instrument, MIDI, and other VCA Master tracks in a VCA-controlled group. Muting a VCA-controlled group does not change the underlying mute state of slave tracks. (Mute buttons on slave tracks that were previously unmuted show an implicit mute.)
Solo
The VCA Solo button controls the solo state of audio, Auxiliary Input, Instrument, MIDI, and other VCA Master tracks in a VCA-controlled group.
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Soloing a VCA Master will implicitly mute all tracks except its slave tracks, thereby indirectly soloing the slave tracks.
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Soloing a VCA Master will clear any explicit solos on its slave tracks, leaving them indirectly soloed, and implicitly mute all other tracks.
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Explicitly soloing a slave track while its VCA Master track is soloed will override the VCA Master solo.
Record Enable
The VCA Record Enable button toggles the Record Enable status of only those audio, Instrument, and other VCA tracks that have already been record-enabled individually. You can then toggle record enable on and off for those tracks using the VCA Master Record Enable.
To temporarily force all slave tracks to toggle their record enable status:
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Option-click (Mac) or Alt-click (Windows) the Record Enable button on the VCA Master.
TrackInput
The VCA TrackInput button toggles the input monitor status of only those audio tracks in a VCA-controlled group that are record-enabled. You can toggle input monitor status for those tracks using the VCA Master TrackInput button.
To temporarily force all slave tracks to toggle their input monitoring status:
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Option-click (Mac) or Alt-click (Windows) the VCA Master TrackInput button on the VCA Master.
Level Meter
On VCA Master tracks, level meters indicate the highest level occurring on any of its individual tracks, not a summed level of all slave tracks.
The channel format of level meters on the VCA Master is set according to the channel formats of its slave tracks, as follows:
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If all slave tracks are the same channel format (mono, stereo or a multichannel format), the number of level meters on the VCA Master track is identical to that of the slave tracks.
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If the slave tracks are different formats, the number of level meters on the VCA Master track is set to one.