2500 JJOSXL midi “internal sound off”

MPC 2500 JJOSXL 3.54 or 3.55 Question:
I want to turn ‘Internal sound off’ (otherwise called ‘local control off’), so I can use mpc as a master controller for my midi keyboards and other MPCs as well.
I could do this on Akai Os and JJOS 3.13 but I don’t think I can find it on JJOSXL.
Thanks in advance!

I've never used or heard of "local control" or "internal sound" functions..........so maybe you're referring to something else, but I have a 2500 with JJOSXL & when I want to control synths, other samplers, romplers, ect. it's a track by track basis, each track in your MPC can do something different.
So I do the following for example:
Track 1, I want to control an external synth. I don't put a program on track 1 (so no samples are assigned to track 1) & on the rightside of the screen you select the midi port & midi channel. If the synth is hooked up to midi port B, I would select midi B 1.
Then track 2, I want to control another sampler. Don't put a program on that track, select the midi port it's connected to & the midi channel.
Track 3, I want to use samples in the MPC. Select the program that has the samples I want to use & don't assign midi to it.

you can just create a programm and assign no samples to it, so you have midi only programms.
have some of them, each named after the device it controls like virus, hr16 and so on.

Just create empty program, and assign to any track.