Thanks to everyone who responded with helpful suggestions. I got the
"Cybernetic Music" book and am really enjoying it because it has working
APL that I can translate to J - though Thomas McGuire may have already done
the work on this - and it tries to explain musical notation to a programmer
so I'm getting a lot out of that. So far I have just been reading the book
and sharing parts of it with my musical collaborator to see what she thinks
of the music part.
I plan to start playing with the code soon - thanks again for the helpful
examples people sent.
Regards,
Devon
On Mon, Mar 30, 2020 at 3:18 PM Thomas McGuire <tmcguir...@gmail.com> wrote:
> For those of you interested in using J as an adjunct to lilypond or other
> such program:
>
> Making a few changes to the lilypond statements that get prepended and
> appended to the notes generated (in my previous email on the subject). You
> can get lilypond to generate a midi file of the score:
>
> lilypondhdr =: ('\score{',LF);('\version "2.20.0"',LF);('\relative c''
> {',LF);('\clef treble',LF);('\time 3/4',LF)
> lilypondend =: (('\layout {}',LF);('\midi {}',LF)),<'}'
> 'lilymusic.ly' fwrites~ ; lilypondhdr,(LF,~ each
> lilypondnotes,<'}'),lilypondend
>
> Basically adding the score tag and inserting '\layout {}’ and ‘\midi {}’
> causes lilypond to generate both a pdf of the score and a midi file that
> GargeBand or other such program can play for you. When I generated MusicXML
> the musescore program could play the tune right from the score.
>
> Tom McGuire
>
> > On Mar 29, 2020, at 2:39 PM, Thomas McGuire <tmcguir...@gmail.com>
> wrote:
> >
> > Using the wavefile.ijs that contains the VOSS routine for generating
> random note sequences:
> >
> > mynotes =: 30 voss 3
> > mynotes
> > 7 8 6 11 13 14 6 9 7 12 10 9 12 12 8 11 11 7 11 13 6 8 12 11 15 11 10 12
> 6 10
> >
> > NB. Then using the NumToName function in MusicalSyntax.ijs
> > NB. I get a boxed list of note names with octaves (adding 60 makes them
> be around middle C):
> >
> > NumToName each ;/60+mynotes
> >
> ┌──┬───┬───┬──┬───┬──┬───┬──┬──┬──┬───┬──┬──┬──┬───┬──┬──┬──┬──┬───┬───┬───┬──┬──┬───┬──┬───┬──┬───┬───┐
> >
> │G4│G#4│F#4│B4│C#5│D5│F#4│A4│G4│C5│A#4│A4│C5│C5│G#4│B4│B4│G4│B4│C#5│F#4│G#4│C5│B4│D#5│B4│A#4│C5│F#4│A#4│
> >
> └──┴───┴───┴──┴───┴──┴───┴──┴──┴──┴───┴──┴──┴──┴───┴──┴──┴──┴──┴───┴───┴───┴──┴──┴───┴──┴───┴──┴───┴───┘
> >
> > NB. Then massage that into something more lilypondish,
> > NB. get rid of octave (you could convert the number into lilypond
> apostrophes to set the octave),
> > NB. make letters all lowercase, change the sharp symbol to ‘es’.
> > NB. Then put them into groups of 3’s for 3/4 time.
> > NB. (Replace _3 ]\ with _4 ]\ to group for 4/4 qtr notes)
> >
> > ('%s %s %s'&sprintf) each <"1 ]_3 ]\ tolower each
> ('#';'es')&stringreplace each _1}. each NumToName each ;/60+mynotes
> >
> ┌─────────┬───────┬───────┬───────┬───────┬─────┬─────────┬───────┬─────────┬─────────┐
> > │g ges fes│b ces d│fes a g│c aes a│c c ges│b b g│b ces fes│ges c b│des b
> aes│c fes aes│
> >
> └─────────┴───────┴───────┴───────┴───────┴─────┴─────────┴───────┴─────────┴─────────┘
> >
> > NB. So putting it all together you get the following
> > lilypondnotes =: ('%s %s %s'&sprintf) each <"1 ]_3 ]\ tolower each
> ('#’;'is')&stringreplace each _1}. each NumToName each ;/60+mynotes
> >
> ┌─────────┬───────┬───────┬───────┬───────┬─────┬─────────┬───────┬─────────┬─────────┐
> > │g gis fis│b cis d│fis a g│c ais a│c c gis│b b g│b cis fis│gis c b│dis b
> ais│c fis ais│
> >
> └─────────┴───────┴───────┴───────┴───────┴─────┴─────────┴───────┴─────────┴─────────┘
> >
> > NB. Now create a lilypondhdr:
> >
> > lilypondhdr =: ('{',LF);('\version "2.20.0"',LF);('\relative c''
> {',LF);('\clef treble',LF);('\time 3/4',LF)
> >
> > 'lilymusic.ly <http://lilymusic.ly/>' fwrites~ ; lilypondhdr,(LF,~ each
> lilypondnotes),(<‘}’,LF),(<‘}’)
> >
> > You end up with a file that looks like:
> > {
> > \version "2.20.0"
> > \relative c' {
> > \clef treble
> > \time 3/4
> > g gis fis
> > b cis d
> > fis a g
> > c ais a
> > c c gis
> > b b g
> > b cis fis
> > gis c b
> > dis b ais
> > c fis ais
> > }
> > }
> >
> > Running it through lilypond gave me the following pdf
> > <lilymusic.pdf>
> >
> >> On Mar 29, 2020, at 3:47 AM, Hauke Rehr <hauke.r...@uni-jena.de
> <mailto:hauke.r...@uni-jena.de>> wrote:
> >>
> >> could one as easily have a lilypond file created instead?
> >> since converting from MusicXML usually doesn’t work that well
> >>
> >> else I’d rather re-implement the music generation in scheme
> >> (guile) in order to use it in lilypond directly
> >>
> >> Am 29.03.20 um 05:14 schrieb Thomas McGuire:
> >>> I have a couple of files one is rough and hastily thrown together. But
> it pulls together a few ideas from various people and tries to implement a
> VOSS algorithm to randomly generate music in a fractal pattern. It will
> also generate MusicXML so you can load it it into a musical score
> application.
> >>> Tom McGuire
> >>>> On Mar 28, 2020, at 5:27 PM, Devon McCormick <devon...@gmail.com
> <mailto:devon...@gmail.com>> wrote:
> >>>>
> >>>> Hi -
> >>>> has anyone done work with generating music or musical phrases in J?
> I'm
> >>>> helping someone develop a music training game that starts by
> generating
> >>>> sounds with a particular key, tempo, and phrase length. The idea is
> to
> >>>> help students to train their ears by testing them on their ability to
> play
> >>>> back a randomly-generated musical phrase.
> >>>>
> >>>> I've told my collaborator that I think the generation part should be
> >>>> relatively straightforward but I am not schooled in music, so I'm not
> sure
> >>>> how to start.
> >>>> I'm guessing that the second part of comparing the user's response to
> the
> >>>> generated phrase will be more difficult but I'd like to get any kind
> of
> >>>> start I can.
> >>>>
> >>>> Does anyone have any ideas about this?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Devon
> >>>>
> >>>> --
> >>>>
> >>>> Devon McCormick, CFA
> >>>>
> >>>> Quantitative Consultant
> >>>> ----------------------------------------------------------------------
> >>>> For information about J forums see
> http://www.jsoftware.com/forums.htm <http://www.jsoftware.com/forums.htm>
> >>> ----------------------------------------------------------------------
> >>> For information about J forums see http://www.jsoftware.com/forums.htm
> <http://www.jsoftware.com/forums.htm>
> >>
> >> --
> >> ----------------------
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> >> neo-layout.org <http://neo-layout.org/>
> >>
> >> ----------------------------------------------------------------------
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> >
>
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
--
Devon McCormick, CFA
Quantitative Consultant
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
