I just fixed a longstanding ‘bug’ in the mini notation https://github.com/tidalcycles/Tidal/issues/560
"x? x? x? x?" in the mini notation will currently either return all ( "x x x x" ) or nothing ( "~ ~ ~ ~" ), on a cycle-by-cycle basis. In the next release, it’ll be able to return a mixture, e.g. "x ~ ~ x".
I’m also adding new [a|b] syntax, bringing choose behaviour to the mini-notation. E.g. [a b|c] will randomly choose between a b or c.
Will be released soon…