Thanks, Rachael.

Here's a link to the song file.

https://www.dropbox.com/s/re5fhe8sj9iuf2...20120%20v.2.MGU

My friend had copied the chords and melody in from a concert copy so that he could transpose it for his clarinet, and just accepted the style that was active at the time. When he sent it to me I wanted to switch to a Latin feel, and came up against the problem.

My theory (for what it's worth) is that BIAB 2014 has lost the option to change from swing to straight when changing styles in that direction (or perhaps I've inadvertently switched it off?), and that the closest it can get to representing a pair of tied eighth-note triplets and a single eighth-note triplet when it's got four subdivisions of a quarter note to deal with is a dotted quarter note and a sixteenth note.

I'm thinking that a pair of swing eighth notes are 8/48ths and 4/48ths respectively, while a set of 4 straight 16th notes are 3/48ths each, so the beginning of the second swing eighth is closest to the beginning of the last 16th note.

It would make me feel less alone if you could confirm that BIAB 2014 does the same for you on the linked piece...

Michael