10.6

261Logic Pro Instruments
Controllers 0 and 32 are reserved for Bank Select messages, controller 1 is used as
modulation source in the router, controllers 33 to 63 work as LSB for controllers 1 to 31,
controllers 64 to 69 are reserved for pedal messages, controllers 120 to 127 are reserved
for channel mode messages.
In the MIDI specification, all controllers from 0 to 31 are known as Most Significant Byte
(MSB) controller definitions. Each of these controllers (0 to 31) also contains a Least
Significant Byte (LSB) controller definition (32 to 63). Use of this secondary LSB controller
in conjunction with the MSB controller allows for a resolution of 14bits instead of 7bits.
The ES2 recognizes these control change messages—the breath or expression controllers,
for example.
To explain:
• 14-bit controllers are pairs of normal Control Change (CC) messages, where the number
of the second CC message (the LSB) is 32 higher than the first CC message (the MSB).
Examples of valid 14-bit pairs are:CC1/33, CC7/39, and CC10/42.
• 14-bit controllers have a resolution of 16,384 steps, allowing very precise control of
plug-in parameters. The first CC message of a 14-bit pair (the MSB) has a coarse
resolution of 128 steps. Each of these steps can be divided into a further 128 substeps
using the second CC message (the LSB). This results in 128 x 128=16,384 steps.
• You don’t need to create new, or special, data types to use 14-bit controllers. The finer
resolution is achieved by complementing the assigned CC message (the MSB) with
its LSB. The CC message assigned in the ES2 can always be used alone if your MIDI
controller isn’t capable of sending 14-bit messages, thus limiting the resolution to
7-bit=128 steps.
The 14-bit capability is the reason why CC numbers 33–63 can’t be assigned in the
CtrlA–F menus. Using these (LSB) CC numbers would result in changing 1/128th of the
parameter range—or put another way, 128 continuous steps out of 16,384.
Assign a MIDI controller in ES2
1. In Logic Pro, click the MIDI button in the lower-left corner to display the Controller
Assignments.
2. Choose the controller name or number that you want to use from any Ctrl A to Ctrl F
pop-up menu.
Learn a MIDI controller assignment in ES2
1. In Logic Pro, click the MIDI button in the lower-left corner to display the Controller
Assignments.
2. Choose the Learn item from a control menu (Ctrl A to Ctrl F).
3. Move the selected controller on your MIDI keyboard or controller.
Note: If no suitable MIDI message is received within 20 seconds, the selected control
reverts to the previous value/assignment.