SDS MIDI Merge Build 3x3 Arduino-based

Published on Oct 24, 2019 freshnelly

"At last, I got around to making a MIDI merger!
It did take 4 days of programming and even after filming this video I found 3 more bugs (well during the video as they always show up then!)

It's a nice little unit with Clock routing, channel re-defining, 3 way keyboard split on each input, up to 10 user configurations can be saved, Input to Output blocking of transport messages, Program changes, and CC's.

The SPLIT is the really cool part as instruments (PC) can be assigned to each region, note offsets (start note) per region, any channel, any output per region, and a 0 to 14 note upward overlap setting. One SPLIT can be assigned to each input so theoretically, you could have 3 splits fanning out to 9 synths.

The output drive is 25mA so hard wire splitting between 2 MIDI synths is easy. I have tried 3 but you get one that's a pig and it's game over ;)

I will be posting the .ino, 3D Print .stl, and some diagrams & data on parts etc. It's really simple as there's hardly any parts.
The OLED is i2c (wire) 128x32 chinese type.

The whole thing is guitar pedal powered but also runs for a long time on a 9 volt battery... well several hours, not really sure

Links:
Program:

http://www.freshnelly.com/midimerge/M...

3d Print files (obj & stl):

http://www.freshnelly.com/midimerge/3...

Info & manual (doc):

http://www.freshnelly.com/midimerge/S..."