From the BIAB PDF documentation

Waltz?

If you want to make a waltz with the StyleMaker, check the “Waltz?” checkbox in the Misc. Style Settings dialog.
Then the StyleMaker will record, and play patterns in 3/4 time. The “8 beat row” will record “6 beat” (2 bar patterns), the “4 beat” will record 3 beat (1 bar) patterns. The “2 beat” and “1 beat” still record 2 and 1 beat patterns.
The new style is made as a waltz, and will play with a 3/4 lead in. There is no need to put a 3/4 time signature change in bar 1.


BIAB for Windows Version 2019 (643)
Windows 10 (1909)