On Tue, 20 Mar 2012, Frank Steinmetzger wrote:
On Tue, Mar 20, 2012 at 09:11:20PM +0100, Martin Tarenskeen wrote:
Hi,
[...]
For this purpose I need to write a pianotune that uses MIDI channel 3 for
the Left Hand part, and MIDI channel 4 for the Right Hand part. A bit
strange, I agree, but this is what the PianoBooster docs tell me to do.
Can Lilypond be tweaked to produce this? It needs to produce a readable
PDF as well as such a MIDI file.
Well since Lilypond enumerates the MIDI channels as they are needed, you
could
simply produce a MIDI score that has one empty staff, thus pushing the other
staves one channel down. (The first channel is used by lilypond itself).
That's one of the things I tried, but doesn't work.
I have discovered Lilypond only creates a new MIDI channel if a Staff contains
music.
For example I created a file miditest.ly:
\version "2.13.34"
\score {
<<
\new Staff {}
\new Staff {}
\new Staff { c' }
\new Staff { c' }
>>
\midi {}
}
Then I called mftext (from abcMIDI toolkit) on the resulting miditest.mid file:
# mftext miditest.mid
And this shows:
Header format=1 ntrks=3 division=384
Track start
Time=0 Meta Text, type=0x03 (Sequence/Track Name) leng=13
Text = <control track>
Time=0 Meta Text, type=0x01 (Text Event) leng=9
Text = <creator: >
Time=0 Meta Text, type=0x01 (Text Event) leng=30
Text = <GNU LilyPond 2.15.34 >
Time=0 Time signature=4/4 MIDI-clocks/click=18 32nd-notes/24-MIDI-clocks=8
Time=0 Tempo, microseconds-per-MIDI-quarter-note=1000000
Time=0 Meta event, end of track
Track end
Track start
Time=0 Note on, chan=1 pitch=60 vol=90
Time=384 Note on, chan=1 pitch=60 vol=0
Time=384 Meta event, end of track
Track end
Track start
Time=0 Note on, chan=2 pitch=60 vol=90
Time=384 Note on, chan=2 pitch=60 vol=0
Time=384 Meta event, end of track
Track end
--
MT
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