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Some MIDI instruments don't work


From: Mark Polesky
Subject: Some MIDI instruments don't work
Date: Sun, 25 Sep 2011 15:47:34 -0700 (PDT)

Hey everyone,

Some choices for Staff.midiInstrument do not generate output
in MIDI.  I did *not* try all 128 instruments, but with a quick
sampling, I found four that don't work:
music box
viola
string ensemble 2
choir aahs

Here's a test file:

\version "2.15.12"

\score {
\new Staff {
%% none of these work:
\set Staff.midiInstrument = #"music box"
% \set Staff.midiInstrument = #"viola"
% \set Staff.midiInstrument = #"string ensemble 2"
% \set Staff.midiInstrument = #"choir aahs"

c'4 c' c' c'
}
\midi {}
}


Here's a typical response from timidity:

$ timidity midi-bug.midi
Playing midi-bug.midi
MIDI file: midi-bug.midi
Format: 1  Tracks: 2  Divisions: 384
Sequence: control track
Text: creator:
Text: GNU LilyPond 2.15.12
Instrument: music box
No instrument mapped to tone bank 0, program 10 - this instrument will not be 
heard
No pre-resampling cache hit
Last 1 MIDI events are ignored
Playing time: ~6 seconds
Notes cut: 0
Notes lost totally: 0


Here's my local info:

$ uname -a
Linux localhost 2.6.32-33-generic #72-Ubuntu SMP Fri Jul 29
21:07:13 UTC 2011 x86_64 GNU/Linux

Any ideas on why this happens?
Thanks.
- Mark




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