I think I sorted out the problem here. The MIDI events are being filtered on output in this code: void MidiPort::processOutEvent( const MidiEvent& event, const MidiTime& time ) { // mask event if( isOutputEnabled() && realOutputChannel() == event.channel() ) { MidiEvent outEvent = ev...

That's what happens with Chromium, Vivaldi, and Opera in Linux.

Wow, that could have saved me a lot of trouble if I hadn't assumed "AppImage" was something for OSX. That was the first thing the web site tried to give me, but I assumed it had mis-identified my OS and so I downloaded the source instead. Anyway, that version does the same thing as the oth...

The version I have is whatever this downloaded for me: git clone --recurse-submodules -b master https://github.com/lmms/lmms I can try another version tomorrow if it'll help, but I don't think this is a recent problem. I also have 1.1.3 from my distribution, and it behaves exactly the same way. Can ...

What OS/version? Linux version 4.4.0-116-lowlatency (buildd@lgw01-amd64-021) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.9) ) #140-Ubuntu SMP PREEMPT Mon Feb 12 22:41:05 UTC 2018 What is your MIDI interface? (Edit -> Settings -> MIDI Settings) ALSA Sequencer What external synth are you...

Yes, I just downloaded it from git tonight. 1.2.0-rc5.276

I'm trying to accept MIDI input from an external MIDI keyboard and use an external MIDI synth at the same time. This works fine when I'm outputting to MIDI channel 1, but when I attempt to switch to a different output channel, I can play notes on the new channel using the little graphical keyboard, ...