"polymetric" bars with the same first beat each like (triolic) 12/16 over 2/4

How can I have bars with the same first beat each like (triolic) 12/16 and a 2/4 in another system of the same bar(s).

It is nearly 8 Years ago when already I asked something similar while the answeres at that time suggested Workarounds - stating, that bars with the same length but different divisions inside are basically not possible in Dorico.

First question: Is that still impossible?
Second Question, how would you write a relative traditional piece of pianomusic notated like this:
a) Beginning:


b) triolic division of the right hand notated as 12/16 over remaining 2/4 in the left hand

Sorry that I asked such a similar question two times, but I hope 8 Years later might perhaps anything been developped, which might make this task easier to solve.

Thank you for every helping hint.

This has always been possible…


poly.dorico (1.2 MB)

That looks exactly how I would like it to be.
But when I try it it looks alread from the moment I asign the 12/16 to the right hand like that:


What is my mistake?

You have to create the 12/16 as a 12/16,8 pickup (it needs to have the same length as 2/4 bar) and you need to reset everything to 2/4 in the following bar (and hide it).
THEN everything in the 12/16 is entered as tuplets (which are hidden).

If you view>show signposts in the file I posted you will see how it is done.

Ahhhhh, Now I’ve got it!

Thank you!