@DaveMueller Per-measure or per-section time signatures are on my list. It’s a bit tricky to implement, as you might imagine, but I’ve been laying the groundwork with my more recent refactorings so I’m most of the way there already.
@RobertBiggs Are you familiar with the “half-measure” command under the “Chart” menu? The “H” key does the same thing – makes the current “boom-chuck” a standalone measure. That covers most all of the crookedness in old-time music, I think, e.g.: Farewell Trion, Jeff Sturgeon, Wild Rose of the Mountain, etc. What Strum Machine can’t (yet) do is break up a “boom chuck” unit, but I have not heard that done in old-time. I think Ken Torke (of Tater Joe’s) said that as he was transcribing his massive tune lists that there was only one song that had crookedness that Strum Machine couldn’t replicate properly.