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MIDI programming error with polyphony


From: Timothy Lanfear
Subject: MIDI programming error with polyphony
Date: Sat, 6 Aug 2016 08:34:48 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0

Bug first appears in 2.19.46.

\version "2.19.46"

\score {
  { a'4 << \new Voice a'4 \new Voice f'4 >> a'2 }
  \midi{}
}

generates

GNU LilyPond 2.19.46
Processing `tmp.ly'
Parsing...
Interpreting music...
MIDI output to `tmp.midi'...
programming error: asked to compute volume at +0.250000 for dynamic span of duration 0.250000 starting at 1/4 continuing, cross fingers programming error: asked to compute volume at +0.250000 for dynamic span of duration 0.250000 starting at 1/4 continuing, cross fingers
Success: compilation successfully completed

--
Timothy Lanfear, Bristol, UK.




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