Filtering is a good idea. Split between song and chorus etc is also a good idea. Putting it the todo list.
I will remove the start pause.
The chord progressions are on their own tracks already?
Yes, I agree, sorry, I should have explained :-).
The chord track is only to be able to use some other generative tools, sequencers, arps and so on on it to make them easiely play in tune with the song from mugen. Or to "recognize" the chordprogression on that track.
Of course it would be bothering to let it play all the time :-)
But if the track is there it will be played :-)
I see what you want and why you want it but that particular use case is a little bit outside the scope of the program at the moment.
However, I could add another 'creator' mode where things like that could be done, where the focus is not so much creating songs to listen to outright, but rather to create building blocks for a DAW do to speak.