Apple Logic Pro 9 - Manual (Page 719)

• Val(ue): Value of the controller. Continuous controllers have a range of 0 to 127. Switch
controllers (CC#64-CC#90) transfer two states: off (val = 0) and on (any value between
1 and 127).
Pitch Bend Events
Pitch bend events are used to continuously vary the pitch. They are usually generated
by a centered pitch bend wheel or joystick on your keyboard.
• Num(ber): Fine pitch bend division (LSB: Least Significant Byte). Many keyboards transmit
a value of 0. If the pitch bend wheel has an 8-bit resolution, you see values of 0 or 64
in this column.
• Val(ue): The effective pitch value (MSB: Most Significant Byte), ranging from 0 to 127.
A value of 64 corresponds to the half-way setting of the wheel.
• Length/Info: The 14-bit value is displayed in this column as a decimal figure ranging
from −8192 to 8191 (if your keyboard transmits 14-bit pitch bend data). The value in
this column can be edited in the usual ways.
Program Change Events
Program change events transmitted to connected MIDI devices are used for patch (preset
or setting) selection. These may be sounds in a synthesizer, programs in an effects unit,
or snapshots in an automated mixing desk, for example.
• Val(ue): A program number between 0 and 127.
• Some manufacturers (such as Yamaha) number the programs in their devices from
1 to 128, not 0 to 127. If you have devices that follow this numbering protocol, you
need to subtract 1 from the program number shown on the device itself, when
adding or altering a program change event.
719 Chapter 25 Editing MIDI Events in the Event List