On Thu, 21 Oct 2010 08:42:09 -0700, Jan wrote:
2010/10/21 Javier Ruiz-Alma
Hello Dear Gurus,
Lilypond is correctly engraving this score in .pdf, which has some
sections of single-staff polyphony. However, the MIDI playback on my PC
plays one voice only. I'm ignorant to where the problem is. Is
my lilypond syntax incorrect? Is my PC (Win7/WMP10) not able to play
multivoice MIDI? Is lilypond not adding the 2nd voice to the MIDI file?
Thank You, Javier
Looks like only the notes that are "repeated" are
lost (i.e. in measure 4 there is still ees2 from lower voice sounding while
ees8 in upper voice appears, and this ees from upper voice is missing).
There is a lot of stuff going on in your example, Javier, but it looks like Jan
narrowed it down to the thing that was bothering you.
Lilypond chooses to omit repeated notes from the MIDI file, if the earlier note
in the same MIDI channel and if the earlier note would continue sounding
through the new note. (Arguably, this is not the very best thing for Lilypond
to do. If I put the repeated notes in by hand-editing the .midi file, they
happen to play on windows media player, but I've heard people argue about
whether such notes are legal MIDI.)
If you have several voices on each staff, but less than 16 voices total, then you
probably want to use the method in the Snippet: "Changing MIDI output to one channel
per voice"
\score {
\new Staff \relative c''
<< <c e g>1 {c,8 e g c e g c e} >>
\layout{}
%\midi {}
\midi {
\context {
\Staff
\remove "Staff_performer"
}
\context {
\Voice
\consists "Staff_performer"
}
}
}
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