Issue (see also New testing image Bookworm Oram 64bits - #551 by gitnob):
After a freshly installed image and after updating around 2 days ago, midi system messages are not sent as received from external device.
Create a simple midi (through) chain, with receiving the external midi system messages and sending them to i.e. midiTTY (also tried with USB connected midi device), the START/STOP/CLOCK sequence sent to midiTTY was the following:
SYS START
SYS START <—
SYS STOP <—
SYS CLOCK
SYS CLOCK
SYS CLOCK
SYS CLOCK
Obscure SYS START/STOP at the beginning.
I think that the patch Send start/stop MIDI messages on jack tranport start/stop. · zynthian/zynthian-ui@18349e3 · GitHub is the culprit.
I recompiled zynseq.cpp without the lines. After this the midi sys messages are correct again, like:
SYS START
SYS CLOCK
SYS CLOCK
SYS CLOCK
SYS CLOCK
Regards