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Chapter 3 Controller assignments 51
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Text Feedback checkbox: Turn on to send a text representation of the current value to the
control surface’s display. The control surface display capabilities determine the display position
and number of characters that are used.
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Local Feedback (Fader/Knob) checkbox: Turn on to stop feedback while the parameter is in
Touch mode. This prevents motorized faders from “ghting” against the user.
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Key Repeat checkbox: Turn on to repeatedly execute the assignment. The Key Repeat Rate
slider—set in OS X Keyboard preferences—determines how quickly Logic Pro repeats the
assignment. The duration that the button must be held for before the assignment is repeated
is set with the Delay Until Repeat slider in Keyboard preferences.
Key Repeat is useful for the zoom function. For example, if you assign a Key Repeat command
to the Mackie Control Zoom buttons, holding the Zoom In button will continuously zoom in
the Logic Pro window until the button is released. The alternative is to repeatedly press the
Mackie Control Zoom buttons to zoom in or out more than one level.
Note: The Key Repeat checkbox is available only for key commands, key presses, and relative
value changes. If any other assignment class is selected, the checkbox is dimmed.
The default key command assignments support the Key Repeat function if useful or applicable
to the control surface or device, making changes unnecessary to use this function. If you
want to enable the Key Repeat function for your own assignments, you may need to use the
re-learn option for the assigned message. Key Repeat messages must include the Lo7 byte,
which provides information on the up (released) or down (pressed) state of the assigned
button. Logic Pro guides you through the re-learning process. The current MIDI message
is automatically cleared, Learn mode is activated, and a help tag prompts you to send the
required MIDI message. Releasing the assigned button—after learning the MIDI message—
automatically creates the Lo7 byte, and assigns the Lo7 value (for the button release message)
to the Min parameter. The Lo7 value for the button pressed message is automatically assigned
to the Max parameter. Typically, the value range of 1 to 127 is used for the button pressed
message. The zero (0) value is generally used for the button release message.
Note: Some control surfaces, such as CM Labs Motormix, may use dierent value ranges.
Assigning appropriate Min and Max values ensures that the Key Repeat function works with
such devices. Take care when manually changing the Min or Max value for a key command
because the complete assignment does not work in cases where the Min and Max values
do not match the button pressed (on) and button released (o) states. Consult your control
surface manual for further information about the values it uses.