[MIDI Channel map] Wrong channel output when moving CC fast

[DepreTux]

Hi!

I'm using channel map in Carla to be able to map the 16 knobs in my controller to more than 16 functions in softsynths.

Using jack_midi_dump, I can see that mapping channel 1 to any channel, ocassionaly outputs on channel 2 when moving the knobs fast.

Mapping channel 2 to any channel outputs on channel 3, with ocassional output on the selected channel when moving the knobs fast.

Mapping channel 3 to any channel, outputs only on channel 3, with ocassional output on channel 16.

Any other input channel seems to output only on channels 2 and 3.

Let me know of any debugging info you might need.

Thanks for all your work!

EDIT: It works ok with jalv.gtk but then I can't map a midi controller to it.
Would this be a carla bug?

EDIT: It doesn't work at all in qtractor.

[x42]

I cannot reproduce this in Ardour3, ingen and jalv. I don't have Carla around to check, but I'm just sitting next to falkTX and will try to check on his machine :)

The code is pretty simple, I can't [yet] see where and how this can go wrong in midifilters.lv2 itself (https://github.com/x42/midifilter.lv2/blob/master/filters/channelfilter.c#L31).

It could be related to qtractor's or carla's handing of LV2 MIDI buffers, but that's just a guess, It could also be caused by using and old version of jack1 (< 0.124) which has limited midi-buffer size...

more later,
robin

[DepreTux]

I'm using jack1 0.124.1, so it isn't that. I tried with ardour3, but I couldn't quite figure how to use the plugin on that host for the desired functionality. Let me know if you have any news.

Thanks!