Recently, I have been working on a drum sequencer to trigger my zynthian with… Today I made some really good progress and I was going to upload a video here with a quick demo but couldn’t because of file size limits… I was really excited to show you too…
I will probably do a proper YouTube of it at some point, but here you can see the display, at least…
(It photo shows 2 lines for the current step, but there is only one, it is moving)
We want the video … 
I wanna share it too, just too big for this forum …
That’s nice!
How do you control it?
I have build a Gizmo
https://cs.gmu.edu/~sean/projects/gizmo/
for the same purpose, but my build is a bit fiddly so the controls are quite annoying.
ESP32 + Max7219? Looks like an inexpensive but powerful combo 
Here you go then… hurry up though before youtube put another copyright strike on me again!
so you should see the following :-
First i reboot the ESP32. This one is in arduino form factor to allow me to use hats. I have a hat here that breaks out 3 pins, +V G and S for each pin.
Then you see the boot sequence
Once booted, it starts running the sequencer
i move the camera so you see me connect to it via rtpMIDI which is already connected to zynthian
then you can hear zynthian play the drum sounds
finally, i change the tempo with an attached pot
The midi is all done over wifi / rtpmidi
The hardware build is sort of getting closer.
And the esp32 based web editor seems to be coming together too.
Hopefully I will have even more progress to show you soon.
