complex project, need advices

yes, that's more this direction, that simple.
actualy it would be a sequencer/arpegiator , but i think it's written sequencer on the pro one, though it's like an arpegiator.
no , indeed, it's not a sequencer in the sense of something like a cubase sequencer, or a midi recorder from cubase ...

yes, and in the end there's a default time signature, synchronised with the global tempo knob.
and in the end of the sequence, it restarts all over again if i selected this option. this is where i'll have to do some programming perhaps, but since i saw that i could program the light of the little led as i wanted, why not ? the sequence just restarted all over again. same principle here.
i'd have to program an architecture where some features of 24 lines can be edited in real time by the controlers, and it would have to understand what note has been chosen for each of the 24 lines, to process them and send them back when hit play.
these are the main lines of the architecture of my project.

then, it's getting more complex, but it would allow me to do whatever i want to do, some cool bas lines à la michael jackson, herbie hancock, jan hammer etc , pure kitsh, pure cool 80'.

and play guitar on it, and my drumer playing with me. a lot of things would be possible to do this way, and to me, it's simple, opened to inspiration ...
no need to set a precise midi track etc like in cubase , or if i need this , my sequencer could have its midi output recorded into cubase anyway, before sending it back to the synth. And then cubase would let me go further, but i don't need that, i like this idea of this simple arpegiator/sequencer, with some notes that may pop out of the line with a tad more velocity, or some bit longer lenghts sometimes, that's all.
just a cool riff interface, that i can transpose sometimes ( so it lets me play the guitar the rest of the time ) , maybe with a foot controler for an octave or two for example ..
this way it's intuitive, fast, fun.

one of the best examples here , listen to the main synth line from jan hammer. Then jan hammer and jeff beck play arround it with a super cool rythm in the end. Very evolved music :