Notes hanging / Zynthian misses note off? [SOLVED]


weird with my mopho synthesizer the notes are still hanging. I will try to install a install the new image freshly, maybe it will work then


I’ve finished building the zynthian kit yesterday, and I’m also experiencing hanging notes with a Yamaha keyboard (via MIDI).
However, I could test the device only shortly and have to check if this happens with all synth engines, or other keyboards.



could your changes rgd the following be the cause?


No. I don’t think so … there are still some problems with SysEx MIDI messages, so perhaps this Yamaha Keyboard is sending some kind of SysEx … could you, @ukitel, verify this?



I’m very unexperienced, so I’m not really sure how to do it.
If I’ve understood well, I would have to read the MIDI output from the Yamaha keyboard and check for SysEx messages: starting with 11110000 and ending with 11110111. Am I right?
I have no way to connect a MIDI port to my computer at the moment, but I could hack something with an arduino and read it from there.
Any simpler way of doing this, through Zynthian interface?


A MIDI record mode similar to the Audio record option might be beneficial.


I created a task:


I was hoping that we could display incoming Midi messages, mainly as an aid for connecting the cables in a setup. But it might be useful to debug these missed notes also.


Prior art!


It’s on the way … :wink:



This problem still seems to exist. I’m using a Yamaha Motif ES. I have to set (on the Motif) Utility - Midi - Sync - ClockOut to Off. Otherwise I get hanging notes all the time.

It can be seen at the Midi In led on the Zynthian: when midi clock is enabled, the led becomes dim green (very fast flashing).

I think I have the latest software, I did an upgrade this week:
zyncoder: master (68503c9)
zynthian-ui: master (8fecb5c)
zynthian-sys: master (1f0fd08)
zynthian-data: master (ba07bbc)
zynthian-webconf: master (752430a)



Could you possibly record the MIDI out ?!?!?!?!?!


OK! I will try to solve it when i come back to my lab in Barcelona. I don’t have a “MIDI-clock generator” … unless … @wyleu do you know if MIDI clock messages are forwarded by QMidiNet? :wink:

Kind Regards,


QmidiNet seems to pass clock messages according to sequencer64 playing via Qmidinet to a zynth with an aseqdump at the zynth end.


Could you verify if this clock messages causes some problem (missing note-offs or similar) with some engine?