(This question is related to Polyend on Superbooth 2023 - #10 by icaria36 and I moved it here.)
Hi @thegretalink, sadly my secret plan to steal an SD card with the last Play release didn’t work out 
ajd I’m not a betatester either but… Yeah, for what I recall I think your use case would work as you say.
The piano roll accepts up to four notes per step, and you select the tracks where those steps belong. I didn’t try, but I guess if you select just one track and use just one note per column, the note information will be stored on each step as expected.
It would be good if someone with access to this feature could confirm or correct.