There's also this standard techno trick where a pulse "1 1 ~ 1 ~ 1" when applied to a progression of "a b c d e f g" would output "a b ~ c ~ d" "e f ~ g ~ a".
I've been wondering how to do this recenty... is this easily achievable at the moment in tidal?
edit: I think rot with a polymetre and timeLoop might get there? http://tidalcycles.org/docs/patternlib/tour/alteration/#rot