
38 Chapter 4 Working in the Mixer Windows
Automating the Bypass Status
Logic Pro 7.2 allows you to toggle the bypass status of Audio Object Insert slots with a
single controller value: namely controller value 64.
The addition of this feature results in the following behaviors for controllers 56 to 70:
 A value of 0 switches bypass off.
 Values 1 to 63 and 65 to 127 switch bypass on.
 Repeated use of value 64 switches between the two bypass states.
This facility allows you to switch the bypass state of Insert slots 1 to 15 with a single
button, assigned to controllers 56 to 70, sending a value of 64. (Earlier versions required
that two different values be sent; one to activate, and one to deactivate, the bypass
status.) The following table lists the controller number used to switch the Bypass status
of the corresponding Insert slot.
This feature may prove particularly useful if you use a control surface that doesn’t
provide feedback. Imagine the following situation: you press the button on your
control surface, sending a value that switches the bypass status of an Insert slot to off.
The bypass status for this Insert is reactivated (turned to on, with the mouse) in Logic.
Your control surface will not reflect this change, if it doesn’t support feedback, leading
to nothing happening when pressing the appropriate button on your control surface.
This new facility allows you to use one button to toggle the bypass status—regardless
of state (bypass on/off).
Insert Slot Controller Number
156
257
358
459
560
661
762
863
964
10 65
11 6 6
12 6 7
13 6 8
14 69
15 7 0
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