Apple Logic Pro X - Manual (Page 419)

Chapter 15 Advanced edit features 419
Poly pressure events
Poly(phonic) pressure events are generated by mechanical pressure sensors beneath each
individual key on some MIDI keyboards. The resulting sound modulation only affects the
particular note that is pressed harder (after the initial keystrike). Only a few keyboards offer
this capability.
•
Ch(annel): MIDI channel of an event from 1 to 16.
•
Num(ber): Displays the MIDI note name (C3, G4, and so on).
•
Val(ue): Displays the amount of pressure on the key (0 to 127).
SysEx events
System exclusive data (SysEx) is unique to individual MIDI devices. You can record these events
by using the dump utilities of your synthesizers, which lets you save patch information, or other
data, outside the MIDI device (in a project or MIDI file). The arrows in front and behind EOX are
used to add or remove bytes.
WARNING: Editing SysEx events requires a thorough understanding of the data format used by
the MIDI device. Incorrect edits can lead to the corruption, or loss, of sound or other data.
You can choose whether SysEx data is displayed in hexadecimal or decimal format in the Event
List or the SysEx fader editors. Hexadecimal digits are preceded by a $ symbol in Logic Pro.
View SysEx data in hexadecimal format
m Choose View > SysEx in Hex Format.
For more information on manually programming a SysEx message, see Work with SysEx faders on
page 799.