Apple Logic Pro 7 User Manual download pdf (Page 679)

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Chapter 22 Control Surface Support 679

MIDI Input

Incoming MIDI messages are only processed on MIDI Input. When this parameter is

changed, all other assignments using the same input will also have their input changed

accordingly. If the assignment belongs to a supported control surface, the device’s MIDI

Input will also change in the Setup window. This feature allows you to create default

assignments for a new control surface, which other users can use immediately. To do

so, they simply need to place your com.apple.Logic.cs preferences file into their

Preferences folder, open the Controller Assignments Editor and change one

assignment’s MIDI Input parameter in accordance with their MIDI setup.

Value Change

The incoming MIDI messages that cause a value change in the destination parameter

are displayed here. To edit these MIDI messages, switch to the Expert View by activating

the corresponding checkbox in the upper right corner of the Controller Assignments

Editor.

In the Expert View you’ll find two fields: the lower one is only a display that shows the

Value Change message in plain text. The upper field display allows the messages to be

viewed and edited as a sequence of bytes, displayed in hexadecimal. There are

placeholders for the variable part:

• Lo7: Low 7 bits of the value

• Hi7: High 7 bits of the value

If there is only a Lo7 placeholder in the message, the value is treated as 7 bit. If there is

also a Hi7 placeholder, the value is treated as 14 bit. The order of Lo7 and Hi7 is

honored, and there may be constant bytes in between. This allows you to define

Control Change LSB and MSB portions. As an example: B0 08 Hi7 B0 28 Lo7

Note: When entering multiple MIDI messages, do not use Running Status. Always write

down the entire MIDI messages, ensuring that you repeat the status byte, even if it’s

the same.

If the message does not contain Lo7 or Hi7 placeholders, an incoming value of 1 is

assumed. This is typical for pressed or released buttons. Also see the “Multiply” section

below.

Touch/Release

The incoming MIDI message(s) causes a change in the touched/released status of the

destination parameter. A non zero value means touched; a value of 0 means released.

The messages are displayed and entered in the same way as the Value Change field (see

the “Value Change” section above).

Note: This only applies to the Track Assignment Class and parameters that can be

automated.

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Apple Logic Pro 7 User Manual Page 679

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