I don’t know what happened but a certain Instrument track has just gone silent. The track is not muted, and the virtual instrument is still loaded onto the track.
When I edit the instrument track’s MIDI data (change velocity of a MIDI note or grab/move a MIDI note around the piano roll) I can hear the instrument being triggered accordingly. But when I press Play to play back the music, the track is completely silent despite there being MIDI data that’s supposed to trigger instrument sounds.
What could cause a track to behave like that?