Hey ,
in fact it's not relative to master or slave if you wanna test the thing I try to achieve... it's relative to the channels only, and the notes , cc and other message relatives to this channel , no need to sync ... I never touched a triton so I can't give you the way to configure it ... and my god, I even give a look to the Triton doc one day but.. ouch my head...
It can be a bit brainstormin for not so much ...
First test you can do easily which let me think the mpc can't do a thing I want :
Select a channel on your midi keyboard (aka Triton in this case ok apologies is not a midi keyboard, anyway, u know ... ), try to record it on track one on Mpc for example... stop the record.
Now change the channel by hand on the Triton keyboard (I don't know how to do this on this synth ) and put n° 2;record again in the same track of mpc.
If you check in the seq edit windows of the mpc you'l see the both channel have been recorded. (left bottom right of the frame on seq edit to change the viewed channel)
That's an issue for my usage......
The second problem concern the fact that mpc 4K cannot in my opinion, route definite channel on a definite track and playback them... when you play the right channel on your module it's because on the mpc track assignation you put for example "midi out A1 : channel 1 - Triton " or if you can sequence the notes and other stuff incoming from the tritton sequencer at same time you put midi "midi out A1 = any" and then you have configured the triton it self to respond only to this channel ... but the mpc in fact see everything ...
that's the issue for me ... it's not obvious because it's not a way to work for studio usage, or just sometimes...
I don't have a camera but it will be obvious if i could show you the thing.
If I don't make a mistake, it's not depending on the gear I use but I have for the moment a standard midi keyboard evolution mk361 , Emx korg (that is supposed mainly to feed my mpc with midi ), EF 303 (as another alternative sequencer and multipurpose box) bitstream 3x to remote control what I want, and synth are just the adorable Juno alpha 1 (polyphonic, monotimbral) , korg ms2000 (polyphonic, bi timbral) and an akai remix 16 as other soundmodule/sampler to mess with ... and I also do the test with Z8 include in the mpc which is polyphonic multitimbral .
It's hard to understand each other

, I'm not dealing in a classic way ...
I read Mpc3000 and 2000 xl (and maybe 60) were able to do what I want because my way to work seemed to be regular in the past (!!! it was hard for me to walk when I 60 released lool ) , sure mpc 1K & 25k jjos2xl can also filter incoming midi data automaticaly before it reach the sequencer or sampler , 5K I don't know, it's not clear ...
Maybe there is a workaround to force mpc 4K to ignore some midi channel with a sysex message which could be include at the beginning of each track... but I don't find it the akai z4 z8 mpc midi implementation outdated guide, and still never learned sysex . And mpc 4K is big and don't have the TC control which reveals good to experiment weird stuff with the inner Z8 sampler... so I put on for the sale, maybe... mama my brain is dead...
i"m surprise nobody else replies ti this topic ... where is 313 ? he told me go on the 25k but .. nothing after...
PS. sorry for me english sometimes it will maybe not help to understand...