I think you have to change rxf in the main menu (shift plus Load/Save) to N for note and dependeng on your keyboard/synth change the midichannel on the global level and for every single voice to the same channel... I hope that was correct :-c
You can't play it chromatically though. It'll only play the drum when you hit the correct note on the keyboard. Also there's a bug where C-3 on the LXR is trigger by C-1 on the synth. Everything is 2 octaves out.
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:-c