It sounds like I'd better explain the triplets issue. The standard allows two forms (x:y and (x:y:n. The first means for example 3 in the time of two, and the second for example a timing of 3:2 but 'n' of them, not necessarily three.

What happens if the second form is used on the ABC-to-PDF package we use is that the superscript '3' over the triple is omitted, so that (3:2:3ABC is visually identical to ABC rather than (3:2ABC.