Hi Diki
my PSR1500 couldn't do it.
I had the option of it either sending all the "style" tracks out via midi or none. I couldn't pick or choose.
Also the PSR bank & Program changes ( via OTS) didn't suit my module, so I was stuck with just the GM bank for melody voices.
Admittedly I was trying to use it with an SD2 module ( no buttons, no screen) so I couldn't pick my sounds etc manually.
Sys ex messages etc , too confusing for me, I tried it years ago, and that was while my brain was still functioning..

Also I would have had to edit the majority of internal styles,(mainly drum tracks) if I wanted the sd2 to play the style parts . THE "PSR" drum mapping doesn't suit any of the keyboards or modules I've got .

Fortunately my PA800 is a better controller than my psr..

[QUOTE]Originally posted by Diki:
[B]Still confused...

So you CAN, per registration, chose which Style Parts get sent out to an external module, and which Parts get played by the Internal Tones on an S900?
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best wishes
Rikki 🧸

Korg PA5X 88 note
SX900
Band in a Box 2022