Bus automation
You can use bus automation envelopes to vary the level of a track sent to a bus.
Adding bus envelopes
A bus envelope controls the level of a track sent to a particular bus. Before you can add a bus envelope, you must add busses to the project. For more information, see The Mixing Console toolbar on page 151.
1.Select the track to which you want to add the bus envelope. (You may select multiple tracks.)
2.Add the envelope to the selected track(s) in one of the following ways:
•From the Insert menu, choose Envelopes, and choose the bus for which you want to add an envelope from the submenu.
•
A purple line representing the envelope appears across the track(s).
Adjusting bus automation levels
1.Select the Automation Settings button 
. The fader handle is displayed as a 
in automation mode.
2.Click the label on the multipurpose slider and choose a bus from the menu.
3.Drag the fader to control the level of the track sent to each of the assignable FX chains that you have created. Dragging the fader to the left cuts the volume; dragging to the right boosts the volume.
The fader behaves differently depending on the track automation recording mode:
•When the track automation mode is set to Off, the fader adjusts the send level of the entire track. In this mode, the automation control acts as a second trim control.
•When the track has a bus envelope and the track automation mode is set to Read, the fader will follow the envelope during playback but cannot be adjusted.
•When the track has a bus envelope and the track automation mode is set to Touch or Latch, the fader edits the envelope setting at the cursor position. If the track does not have an envelope, one will be created when you adjust the fader.
If multiple tracks are selected, all selected tracks are adjusted.
If you adjust the fader during playback, the behavior varies depending on the selected automation recording mode. For more information, see Automating 5.1 surround projects on page 146.
Assignable effects automation
You can use assignable effects automation to vary the level of a track sent to an assignable effects chain.
Adding assignable effect envelopes
An assignable effect envelope controls the level of a track sent to a particular assignable effect chain. Before you can add an assignable effect envelope, you must add an assignable effect chain to the project.
1.Select the track to which you want to add the assignable effect envelope. (You may select multiple tracks.)
2.Add the envelope to the selected track(s) in one of following ways:
•From the Insert menu, choose Envelopes, and choose the assignable effect chain for which you want to add an envelope from the submenu.
•
A green line representing the envelope appears across the track(s).
USING AUTOMATION 139