ES2 provides additional parameters that are accessed by clicking the disclosure triangle at the lower left of the interface.
Extended parameters
MIDI Mono Mode pop-up menu: Choose Off, On (with common base channel 1), or On (with common base channel 16).
In either mode, each voice receives on a different MIDI channel. Per-voice channels support pitchbend, pressure, modwheel, and Ctrl A-F assignment messages. See Make ES2 controller assignments. Controllers and MIDI messages sent on the base channel affect all voices.
Mono Mode Pitch Range pop-up menu: Choose 0, 24, or 48.
The chosen pitch bend range affects individual note pitchbend messages received on all but the common base channel. The default is 48 semitones, which is compatible with the GarageBand for iOS keyboard in pitch mode. When using a MIDI guitar, 24 semitones is the preferable setting because most guitar to MIDI converters use this range by default.