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Controller assignments Expert view Value parameters in Logic Pro for Mac

The parameters in this section control different aspects of incoming MIDI message values.

Value parameters

  • Minimum and Maximum fields: Set the minimum and maximum range for incoming values represented by Lo7 and Hi7. Typically, the minimum defaults to 0, and the maximum defaults to 127. Some control surfaces (such as CM Labs Motor Mix) may use the same message, with different value ranges, for different controls. For more specific information, refer to the documentation that came with your device.

  • Multiply field: Enter a value that is used to scale incoming MIDI values. This is useful for button presses that have a value of 1. For example:

    • To set the automation mode to Write: Set Multiply to 4.00 and Mode to Direct.

    • To decrement a parameter by 1 with a button press: Set Multiply to –1.00 and Mode to Relative.

  • Mode pop-up menu: Choose the mode used by incoming values to modify the current parameter value. The choices are:

    • Direct: The incoming value is used as the parameter value.

    • Toggle: If the parameter’s current value is 0, it is set to the incoming value. All other values set the parameter value to 0. This option is useful for buttons that toggle a value, such as Mute or Solo.

    • Scaled: The incoming value is scaled from its value range to the destination parameter’s value range. This is useful for faders and rotary encoders.

    • Relative: The incoming value is added to the parameter’s current value. This is commonly used for encoders but is also useful for buttons that increment or decrement by a certain amount—specified by the Multiply parameter.

    • Rotate: The incoming value is added to the parameter’s current value, cycling between maximum and minimum values. This is useful for button presses that cycle between modes, such as automation mode.

    • X-OR: The value defines a bit mask (a filter), which is applied to the parameter’s current value with the “exclusive or” Boolean operation. This is useful for activating or deactivating single channel strip types in All view.

      Note: For On/Off parameters, Mode is set to Toggle by default. It is set to Scaled for absolute controls (faders and knobs, for example) or to Relative for encoders.

  • Resolution field: Enter a resolution to specify whether you have finer or coarser control when changing a parameter value.

  • Use Global Resolution checkbox: Choose to use the global resolution. Global resolution applies to all relative assignments that use it. You can turn off global resolution for individual assignments if you want finer or coarser control of a parameter without affecting other assignments.

  • Key Repeat checkbox: Turn on to repeatedly execute the assignment at the rate set by the Key Repeat slider in macOS Keyboard settings. The duration the button must be held for before the assignment is repeated is set with the Delay Until Repeat slider in Keyboard settings.

    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 turn on 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 for Mac 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 different 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 (off) states. Consult your control surface manual for further information about the values it uses.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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