Re: unfoldrepeats makes midi tracks follow one another

[John Comeau]

That did it! Thanks!!! I was quite sure I had already tried that, but
checked my RCS file and I hadn't.

I really don't understand (obvious, isn't it?) how the angle brackets
work, I just go by examples, and though there were examples of both,
using unfoldrepeats and having different instruments, I couldn't find
an example of both together in the same .ly file. So now this will be
in the archives for the next ignoramus... :^)

On Mon, 10 Jan 2005 12:27:36 +0100, Mats Bengtsson
<address@hidden> wrote:
> The problem is how you apply \unfoldrepeats. Actually, apart from
> unfolding the repeats, what you actually do is to say
> 
> \score {
>   <<
>    {
>     \new DrumStaff { \drumContents }
>     \context Staff = trombone \trombone
>    }
>   >>
> 
> Since you have an {...} directly inside the <<...>>, the
> <<...>> will only contain a sequence of drum notes followed by
> the trombone notes.
> 
> I haven't tried, but I'm sure that the following should work
> as you expect.
> \score {
>   \unfoldrepeats <<
>     \new DrumStaff { \drumContents }
>     \context Staff = trombone \trombone
>   >>
> 
> 
>    /Mats
> 
> John Comeau wrote:
> > I'm probably doing something wrong, but have tried several
> > permutations of wrapping things inside one another with the same
> > result: the tracks follow one another in the MIDI output though the
> > graphical representation is correct. Googling and searching archives
> > for unfoldrepeats turns up nothing of value that I could see.
> >
> > downtown_sandiego.ly:
> >
> > tromboneNotes = \relative c {
> >  c16 c c8-. r c16 c d d d8-. r d16 d e e e8-. r e16 e f f f8-. r f16 f
> >  e16 e e8-. r e16 e d d d8-. r d16 d e e e8-. d16 d d8-. e16 e e8-. d16 d 
> > d8-.
> > }
> > trombone = {
> >  \time 4/4
> >  \set Staff.instrument = #"Trombone"
> >  \set Staff.midiInstrument = "trombone"
> >  \clef bass
> >  \repeat volta 2 {
> >   \context Staff <<
> >    \tromboneNotes
> >   >>
> >  }
> > }
> > drumNotes = \drummode {
> >  hh8 sn hh sn hh sn hh sn hh8 sn hh sn hh sn hh sn
> >  hh8 sn hh sn hh sn hh sn hh8 sn hh sn hh sn hh sn
> > }
> > drumContents = {
> >  \set DrumStaff.instrument = #"Drums"
> >  \repeat volta 2 {
> >   \time 4/4 <<
> >    \new DrumVoice { \voiceOne \drumNotes }
> >   >>
> >  }
> > }
> > \score {
> >  <<
> >   \context Staff = trombone \trombone
> >   \new DrumStaff { \drumContents }
> >  >>
> >  \layout { }
> > }
> > \score {
> >  <<
> >   \unfoldrepeats {
> >    \new DrumStaff { \drumContents }
> >    \context Staff = trombone \trombone
> >   }
> >  >>
> >  \midi { \tempo 4=120 }
> > }
> >
> > Dump of downtown_sandiego.midi (http://jcomeau.com/src/midi/midi.py,
> > symlink to mididump)
> >
> > [ # midi file dump
> > [ # dump midi header
> > 'MThd',
> > 6, # chunk length
> > 1, # MIDI file format
> > 3, # Tracks
> > 0x180, # Time Division
> > ], # end of midi header dump
> > [ # midi track 1
> > 'MTrk',
> > 248, # chunk length
> > [0, 0xff, 0x1, 39, 'Creator: GNU LilyPond 2.4.2            '],
> > [0, 0xff, 0x1, 58, 'Generated automatically by: GNU LilyPond 2.4.2          
> >   ']
> > ,
> > [0, 0xff, 0x1, 60, 'at Sun Jan  9 16:22:19 2005
> > '],
> > [0, 0xff, 0x1, 60, 'at Sun Jan  9 16:22:19 2005
> > '],
> > [0, 0xff, 0x3, 7, 'Track 0'],
> > [0, 0xff, 0x2f, 0, ''],
> > ], # end midi track
> > [ # midi track 2
> > 'MTrk',
> > 625, # chunk length
> > [0, 0xc9, 0], # change instrument for channel 9 to Acoustic Grand Piano
> > [0, 0xff, 0x4, 5, 'drums'],
> > [0, 0x99, 0x2a, 0x7f], # Note On, "gf,", channel 9, velocity 127
> > [0, 0xff, 0x58, 4, '\x04\x02\x12\x08'],
> > [0, 0xff, 0x3, 14, 'uniqueContext2'],
> > [0, 0xff, 0x51, 3, '\x07\xa1 '],
> > [192, 0x89, 0x2a, 0x40], # Note Off, "gf,", channel 9, velocity 64
> > [0, 0x99, 0x26, 0x7f], # Note On, "d,", channel 9, velocity 127
> > [192, 0x89, 0x26, 0x40], # Note Off, "d,", channel 9, velocity 64
> > [0, 0x99, 0x2a, 0x7f], # Note On, "gf,", channel 9, velocity 127
> > [192, 0x89, 0x2a, 0x40], # Note Off, "gf,", channel 9, velocity 64
> > [0, 0x99, 0x26, 0x7f], # Note On, "d,", channel 9, velocity 127
> > [192, 0x89, 0x26, 0x40], # Note Off, "d,", channel 9, velocity 64
> > ...[snip]
> > [0, 0xff, 0x2f, 0, ''],
> > ], # end midi track
> > [ # midi track 3
> > 'MTrk',
> > 751, # chunk length
> > #
> > # *** NOTE DELTA OF NEXT EVENT -- trombone follows drums! ***
> > #
> > [12288, 0xc1, 57], # change instrument for channel 1 to Trombone
> > [0, 0xff, 0x4, 8, 'trombone'],
> > [0, 0x91, 0x30, 0x7f], # Note On, "c", channel 1, velocity 127
> > [0, 0xff, 0x58, 4, '\x04\x02\x12\x08'],
> > [0, 0xff, 0x3, 8, 'trombone'],
> > [0, 0xff, 0x51, 3, '\x07\xa1 '],
> > [96, 0x81, 0x30, 0x40], # Note Off, "c", channel 1, velocity 64
> > [0, 0x91, 0x30, 0x7f], # Note On, "c", channel 1, velocity 127
> > [96, 0x81, 0x30, 0x40], # Note Off, "c", channel 1, velocity 64
> > [0, 0x91, 0x30, 0x7f], # Note On, "c", channel 1, velocity 127
> > [192, 0x81, 0x30, 0x40], # Note Off, "c", channel 1, velocity 64
> > [192, 0x91, 0x30, 0x7f], # Note On, "c", channel 1, velocity 127
> > [96, 0x81, 0x30, 0x40], # Note Off, "c", channel 1, velocity 64
> > ...[snip]
> > [0, 0xff, 0x2f, 0, ''],
> > ], # end midi track
> > ] # end midi file
> >
> > 
> > _______________________________________________
> > bug-lilypond mailing list
> > address@hidden
> > http://lists.gnu.org/mailman/listinfo/bug-lilypond
> 
> --
> =============================================
>         Mats Bengtsson
>         Signal Processing
>         Signals, Sensors and Systems
>         Royal Institute of Technology
>         SE-100 44  STOCKHOLM
>         Sweden
>         Phone: (+46) 8 790 8463
>          Fax:   (+46) 8 790 7260
>         Email: address@hidden
>         WWW: http://www.s3.kth.se/~mabe
> =============================================
> 


-- 
John Comeau <address@hidden> http://jcomeau.com/
"Have you googled yourself lately?"