When conveyed by a MIDI file: MS 3.6/3.7 unison durations of equal value are not equal in length in my DAW

It took a while to figure out why MuseScore MIDI files are sometimes peppered with very short notes that interfere with playback in my DAW.

When a single staff in museScore file contains unison notes, and I export to MIDI, on importing the MIDI file to my DAW one unison appears at the expected length and the other is a short blip with its onset a correctly aligned onset time.

Unknown matters include:

   • if MuseScore 3 is exporting MIDI incorrectly
   • if my DAW is generating the issue when I import the MIDI file

Here's my test score:

      Exporting unision notes to a MIDI file SUTB.mscz

And this is the MIDI file it exports

      Exporting unision notes to a 3-7 MIDI file SUTB.mid

Bringing the issue to the light of day

I can reveal the blips in my DAW by selecting the notes of proper duration and dragging them up one semitone, as shown:
    

NOTE: I haven't tested the behavior when unisons are on different staves.

scorster