Maybe I missed something in the manual, but what is the basic pitch of the LXR when the coarse tune value is set to 0? Each increment of the coarse tune value transposes the LXR by 1 semitone, right?
No. The coarse parameter affects only the pitch of the drum sound on the unit. The note parameter on the individual steps affects the midi note that is sent (and also alters the pitch of the drum sound).
Comments
Example: midi note 36 corresponds to C1 (depending on definition), pitch 65,4 Hz
The coarse controls adjust the tuning of a single oscillator and are semitones, just like the note control.
fine is +/-50ct.
so with the note set to zero, the tune of the voice is determined by the coarsesetting of the single oscillators.
the pitch table that is used by the oscillators can be found in this file
https://github.com/SonicPotions/LXR/blob/master/mainboard/firmware/DrumSynth_FPU/src/MIDI/MidiNoteNumbers.h