I tried to do this but somehow couldnt figure out a way:
I have Zynthian running latest SD img on rpi4b, plus connected midi-keyboard which works fine.
Now midi keyboard uses midi channel 1.
I can add layer and set up an engine like obxd on midi channel 1 just fine.
Now I see Transpose and Layer split and i wonder if i can add another engine on another layer also using midi channel 1, so i can either stack sounds or use split keyboard to play e.g. bass sound at lower part and string on higher part ?
Any tip or explanation how many parts i could stack would be great.
If someone else wonders what I did:
I created a synth layer with a midi channel that my keyboard could interact with (channel 1).
Then long-clicked on that layer and selected Clone Midi, so any notes received from that layer are also send to other midi channels that I select. Then after I added more instruments on layers corresponding to those midi channels, they all played sound simultaneously.