The particular notation at that points consists of triplets. I tried to do this also with an arrangement of He Ain't Heavy He's My Brother at bar 12 (and 28) of the chorus that the melody has 1/4 note triplets. I never found anything that fitted exactly, but used a Hold (e.g. C...bd) leading into a Part A marker on the following bar, which gave a usable result.

However, BIAB 2012.5 onwards has Midi Supertracks. I think this is your best answer, choose the desired style, then just edit the midi data to convert the bars to a triplet feel.

Regards
Trevor


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