Select all notes and convert to playable,
zoom out and create a mute section at the start then drag it all the way over all notes, it needs an auto horizontal scroll to draw the green mute section.
You can cut/paste the green mute note to play audio or midi.
Or just copy the midi to another track.
It needs a better way to do this, there needs to be an option in the drop down list to mute audio and play all midi notes.