Inspired by the Monome appz named tessel (monome.org/docs/app:tessell) by sleepersecond, here a demo of a free add-on for Sensomusic Usine ( sensomusic.org) . Works with the free version and a Launchpad.
The up round buttons change presets
The first row sends bus on/off to FXs (Usine patches or Plug-ins).
Then 3 rows for Midi sequences and 4 rows for samplers.
On the right, the round buttons column randomizes its respective sequence.
The ? opens an option panel for midi and samplers settings.
The wiki page with explanations ; (sensomusic.com/wiki2/doku.php?id=hollyhock:manual:modules:patches:re_tessel_v_0_1)