I don't think so. Considering you need a pitch name, a duration, and an
octave indication (depending), this syntax is entirely natural and it is
no surprise it may occur in many programs. It's a natural idea,
spontaneously arising many times.
Well, Humdrum predates Lilypond, so your hypothesis is possible, by
quite some time. Let's hear from the original authors!
Andrew
Jacques Menu wrote on 17/04/2021 6:51 AM
I seem to have read somewhere that the notation such as c’4.. has been inspired
by another well-known syntax, maybe refering to Humdrum.
Does anyone know more about this?