So, I’ve put together a nice little 8GB Pi 4 Zynthian - it’s all gone smoothly, except…
One MIDI cable appears to have reversed wires on the plug.
I’ve now removed it from the equation (it’s on Thru with the LED connected and no devices) but nothing is making MIDI work and any attempt to play the demo MIDI test file (which doesn’t play via the MIDI out) sounds like total warped gibberish with sort of recognisable bits of the tune) is unlistenable.
I’ve burned the image twice and checked my wiring etc. but this seems like such a bizarre failure. The screen is working and when I plugged in a USB MIDI keyboard that worked fine for controlling the synths - it’s just the internal MIDI ports that aren’t working. Faulty board? How does MIDI clock work/timing, given the bizarre playback from a clean install on the MIDI test?
Plugged a MIDI signal tester into the MIDI out and I just get a solid red light, too - stands to reason as that’s all the activity LED is equivalent to. Something’s clearly not right, but as you can’t get the ribbon ‘wrong’ and have a working machine essentially as far as I can tell - what’s the issue?
This is more irritating than if it just didn’t work. To actually use it I’ll need it to be a class-compliant MIDI device, not host. But I think part of it is this duff MIDI cable.
Related: Should the MIDI out LED light as soon as MIDI device is connected to it? MIDI in flickers with I use a MIDI device (not if I use the miswired-looking cable). Either there’s something wrong with the Zynaptik module, or the reversed-wire MIDI cable has damaged that module, or I’m doing something wrong with the software, but it’s proving very difficult to find an actual ‘same situation’ answer on here or in the wiki
Aside from this pretty impressed with what I have put together and seen working.