I have 2 zynthians, one 3B and 5" GIPO screen one 3B+ and HDMI 7" screen, encoders connected directly to the GPIO pins and working fine…
Here’s a little fun jam I did with the 3B+ (which also have embedded battery cell, amp+speaker) for last weekend Hardware Jam Challenge (a group on FB) which topic was 007. Execution is not perfect but the ZynSeq is really a great addition and makes it easier to play .
So far so good… but I just ordered a zynaptic 2 to get my Zynthian synced in MIDI to my other gear and maybe send/receive CV/gate. I found out I will certainly lack some GPIO pin to plug all encoders (and what about a sound card or the 5 inch screen ?) .
Should I install another MCP23017 ? Did anybody tried to use some 74hc4067 multiplexers ?
I also would like to add a couple of extra buttons to access the sequencer and extra encoders to have some functions accessible instantly.
I have been tempted by the zynscreen but was afraid of the screen size, drawing notes on a 7" screen is already a bit tricky, on the 5" I have to use a needle so I guess it must be done with the encoders on a 3,5".
Also is there some way to implement OPEN STAGE CONTROL ? This is the ultimate tool to make an OSC modular MIDI controller.
Thanks a lot anyway for making this box real, it is fun and powerful.
Have a nice day