The Play controls let you set basic parameters for the current part, including pitch transposition, keyboard splits, voicing behavior, and pitch bend range.
The Tr/Fine (Transpose/Fine Tune) section includes two different controls for transposing incoming MIDI notes. The Semitone control (the upper control) transposes incoming notes up or down in semitones. For finer control, use the Cents control (the lower control), which transposes notes up or down in cents.
Use the Hi/Lo Key controls to assign Parts to different keyboard ranges. This can be useful for splitting your keyboard across different Parts. For example, Part A holding a bass sound could be assigned C-1 to B2 and Part 2 your synth lead assigned C3 to G8.
The Voice Mode section controls the voice behavior of each Part. The Mono/Poly selector (the upper control) chooses between Monophonic (one note playable at a time) and Polyphonic (more than one note playable at a time) modes.
The lower control’s function is different in each mode. In Mono mode, it selects the key priority (Last, First, High, Low), which defines which note is played when more than one note is played at once. In Poly mode, it selects how many notes of polyphony are available (1–64).
Use the PB Range control to select how many semitones the given Part can be bent up or down by pitch bend controller data.