Is there a built-in lilypond function that would take a list of notes and a duration and apply the latter to each member of the former? Say you have a common triad
triad = { c e g }
and you would like to apply durations, e.g. 4 and 8, to produce patterns like {c4 e g}, {c8 e g}, etc.
Something like
\changeDuration 4 \triad ==> {c4 e g}
\changeDuration 8 \triad ==> {c8 e g}
There is a lilypond scaleDuration function but it does not change the appearance of the notes, only their value in internal computations and midi production.
If such a function must be written, I would appreciate pointers on how to proceed, as I have not written a line of lisp in decades.
Cheers,
S.