pub fn quarter_conversion(
quarter_length: FloatType,
) -> (Vec<(DurationType, u32)>, Option<Tuplet>)Expand description
The written note values a length is made of and the tuplet, if any, they
are written inside: music21’s quarterConversion.
One value for a plain or dotted note, one for a tuplet (the written
value, which the tuplet’s ratio then scales), and several for a length
that can only be written as a tie — a quarter tied to a sixteenth for
five sixteenths. Empty for a length that runs off the end of the note
values, which is music21’s inexpressible, and for a length of nought.
The tie is found greedily, largest value first, as music21 finds it:
take the largest note that fits, and look for a single dotted value
covering what is left before taking another bite. A length no tie of
eight values reaches is written as one note inside the tuplet
quarter_length_to_non_power_of_2_tuplet finds.