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grace notes (sometimes) corrupt MIDI timing

From: smilauer
Subject: grace notes (sometimes) corrupt MIDI timing
Date: Wed, 28 May 2003 11:24:14 +0200 (CEST)


following code gives wrong MIDI output; listen to the lower staff
getting out-of-sync with the upper one ("metronome"). Paper
output is OK.

There is some relationship with duration of the note _before_ the
grace note (e16|... is OK, e32|... not).

Lilypond version 1.7.18.

[a bit unrelated remark: Lilypond should warn if grace music is
longer than the regular note after it is attached to.]

Cheers, Vaclav

  \context Staff=metronome{
    \time 6/8
    \notes \relative c' {
       g'4 g g |
       a a a |
       b b b |
  \context Staff=buggy<
    \notes \relative c {\clef bass
      % this is OK
      %   e2 e8. e16 | %OK
      % here is the BUG
      e2 e8.. e32 | %bug
      \grace{g8} fis4. fis |
      g4 g g |
  \paper{}\midi{\tempo 4 = 60}

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