Hi  Randy,
what are you using for the midi sounds, a soft synth or one of your keyboards.
Have had no luck using sx900, no matter what setting I try  my midi drums default to piano sound, or violin. Tried XG setting.
Only mode I actually get drums is if I set  I set biab to GS, and then I can’t access the rest of the sx900 sounds.
So hoping one of my settings might be incorrect.
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best wishes
Rikki  🧸
Korg PA5X 88 note
SX900
 Band in a Box 2022