Chord-midi x42-plugin randomly omits notes or doesn't create chords in ardour9

#1

The chord-midi plugin from x42-plugins works when i first create a region in a region of a track.
If i make changes to the notes in the region, like transpose one of them, it randomly can either omit to play one/several of the notes at all, or for some it doesn’t create a chord.
This happens while i “loop” over a region, or several regions.
As discussed in IRC, disabling “chase MIDI” in “preferences” helps a bit, but doesn’t completely solve the problem.

a) I said randomly, and i can’t find a way to reliably make it happen, it really is quite randomly. It can work for a (short) while
b) the described behaviour is also observable in the scroomer/pianoroll of the track
c) duplication the track, the same behaviour can be observed in the dublicated track (as said: randomly)
d) copy the region to a newly created track, midi-chord seems to work again
e) it happens in Ardour9.2 and in 2 nightly builds (215 and 248). midi-chord works reliably in Ardour8

I really wish i could be more detailed, but it is quite randomly, for now i haven’t figured it out (what triggers it and what will happen, omit note or simply don’t create a chord).
I made a short video about the behaviour with a most basic new created session, in case the description was not clear.
In case short on time: the problem is observable minute 0.40ff

chord-midi

Also, side question, how can i link to a video with a preview ? :slight_smile:

I made a second short video with ACE-MIDI-monitor enabled, as adviced in IRC. I can’t see anything unusual in midi-monitor, midi seems to toggle between on and off:
with-midi-monitor

1 Like
#2

I don’t know if this is a similar cause but I may have a similar issue with other x42 MIDI plugins. I use x42 Channel Map and Key Range Filter plugins.

I didn’t encounter this problem in Ardour 8.12 but encounter this issue most sessions with Ardour 9.2.

In my case - I have a MIDI keyboard controller connected through Ardour which is connected to an external MIDI synth. What seems to happen is that note-off events are randomly dropped for random notes at random times in a random session. I’ve been meaning to try to troubleshoot further and submit a forum post and bug report - but have not found the time yet. I fix for now by restarting Ardour.

I have found that I encounter the issue the most if I play the Schmitt Op.16 Preparatory Exercises For the Piano. Most times by the time I’m half-way through the exercise book - the problem has presented itself.

I have other MIDI controller issues with Ardour 9.2 with MIDI controllers where my Akai MIDIMIX and Korg NanoKontrol2 are unusable as control surfaces for any automation controllers. I can see the full range of MIDI CC event values being received when a knob or slider is used but the automation is inconsistent and will not progress unless moved at slower than a snails pace no matter what the smoothing value is set to. The control will work reliability if assigned to a channel volume but is unreliable if assigned to an automation control.