Thank's for your response!
The idea became from that I understand that what I love the most about LSDJ was also the workflow and that it can be used with buttons and knobs which is build normally for gaming but controllers for gaming are the best we can find in term of ergonomy and so there is nothing more comfortable than make music with gamepad or with handheld console in my opinion...
I tried M8 tracker headless, which is maybe the best in this direction but I steel have problems on it (can't save a song or can't use my preferred gamepad (I use it with webdisplay app because i'm on linux). And I like the thing to add the fonctionnality I want on the code.
I thought about using many things like lsdj but maybe some things different like the song screen. It should be easyer to do I think if it was something like
[1] 2 3 4 5 6 7 + (go on + and press a for add one) ([1] is the one playing) and if you want to loop in one number, you press for exemple B on it.
>--C-------------
----D-------------
----E------------
----G-------------
For now, the grid must be finished and and navigation must be finished where there is bugs.
I have an other project file where I was wrong started but where the playing note and tracker moving works good so I can use what I already done on it.
If you want me to share it, send me a private message with your email.