Re: Stem duration

[Knut Petersen]

Am 05.07.2017 um 10:26 schrieb David Kastrup:
> Knut Petersen <address@hidden> writes:
>
> > Shouldn't a stem not have a duration equal to the duration of the
> > notehead it is attached to?
> A stem could be attached to several different noteheads ("string
> chords", usually arpeggiated in some manner).  LilyPond does not do this
> well currently but that does not mean that it shouldn't: it is a common
> type of notation.
Interesting. Noteheads of different duration attached to a single stem?
I don't remember to have seen something like that, and google does not
really help. Which instrument uses such a notation, could you give an
example?

> So assigning a duration to a stem seems like something that would not
> universally work anyway.

Actually it's documented that stems have a duration, and it would be quite 
useful for me:
I try to extend my video generation script to change the color of the notes 
that are
sounding at a certain moment. If there is a note still active in one voice 
while a new
note is played in another voice _both_ should be colored ... that's only 
easy/reliable
if  noteheads, rests, stems, flags and lyric syllables all have a correct 
duration.

AFAICS only the duration of noteheads and rests is really usable in lilypond.

Knut