Thank you again Leo,
This comes very handy.
BEst
K
On Wed, Jan 18, 2023 at 11:14:39AM +0100, Leo Correia de Verdier wrote:
> If the warnings bother you you could use a function to suppress them, like:
>
> irrtime = #(define-music-function (frac) (pair?)
> #{ #(ly:expect-warning "strange time signature found")
> \time #frac #} )
>
> \score {
> \relative c' {
> \irrtime 4/5
> \tuplet 5/4 1 {
> c4 d e f |
> g a2 g4 |
> f2 g |
> e4 f e d |
> c1 | }
> }}
>
> Or something more elegantly coded…
>
> And everyone else: Can we talk about breve? It is nowadays usually one of the
> longest durations. I think we should change its name! 😉 (or possibly keep on
> topic)
>
> Best wishes
> /Leo
>
> > 17 jan. 2023 kl. 16:13 skrev Karim Haddad <karim.had...@ircam.fr>:
> >
> > Thank you a lot Leo for your advice.
> > I'll hence stick with solution #1 which looks preferable.
> >
> > @all
> > Now about "irrational meter" (or "irrational" rhythms), well this
> > denomination is from the fifties. I am aware that mathematically this is
> > not correct since it is a fraction.However, "irregular" is somehow more
> > vague and doesn't relate to anything in particular. Thanks to Hans' link
> > that shows that it is a somehow a common terminology in music practice.
> >
> > Best to all of you, and thank you for all your comments.
> >
> > Karim
> >
> >
> >
> > On Tue, Jan 17, 2023 at 01:30:49PM +0100, Leo Correia de Verdier wrote:
> >> Hi Karim!
> >>
> >> Your first example seems to work to me (I don’t do irrational meters
> >> everyday, so there might be something I’m missing. I would probably write
> >> the tuplets explicitly rather than use \scaleDurations).
> >> \set Staff.timeSignatureFraction is superfluous, the time signature
> >> already does that.
> >>
> >> I’m not sure what you’re aiming at with the second example. One source of
> >> error is that you have quoted ly:make-moment, and it wants its arguments
> >> as elements of a list, not as a fraction, so:
> >> #(ly:make-moment 16 25)
> >> , not
> >> #'(ly:make-moment 16/25)
> >> But it is still not the right amount of notes in the bar.
> >>
> >> HTH
> >> /Leo
> >>
> >>> 17 jan. 2023 kl. 12:16 skrev Karim Haddad <karim.had...@ircam.fr>:
> >>>
> >>> Hi,
> >>>
> >>> I am wondering which is the best way to write irrational meters (with
> >>> tempo modulations)
> >>>
> >>> 1)
> >>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> >>> \version "2.24.0"
> >>> \score {
> >>> {
> >>>
> >>> \clef "G"
> >>>
> >>> \scaleDurations 4/5 {
> >>> \time 4/5
> >>> \set Staff.timeSignatureFraction = #'(4 . 5)
> >>> \mark \markup {\left-column {{\line { \smaller \general-align #Y #DOWN
> >>> \note {4} #1 " = 60 "}} \tiny "1"}}
> >>> c'4
> >>> c'4
> >>> c'4
> >>> c'4
> >>> |
> >>> }
> >>> \once \set Staff.whichBar = "|"
> >>> }
> >>>
> >>>
> >>> \layout {
> >>>
> >>> \context {\Score
> >>> % measureBarType=#""
> >>> }
> >>>
> >>> }
> >>> }
> >>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> >>>
> >>> or
> >>>
> >>> 2)
> >>>
> >>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> >>> \version "2.24.0"
> >>> \score {
> >>> {
> >>> \clef "G"
> >>>
> >>> \time 4/5
> >>> \set Staff.timeSignatureFraction = #'(4 . 5)
> >>> \set Timing.measureLength = #'(ly:make-moment 16/25)
> >>> \mark \markup {\left-column {{\line { \smaller \general-align #Y #DOWN
> >>> \note {4} #1 " = 60 "}} \tiny "1"}}
> >>> c'4
> >>> c'4
> >>> c'4
> >>> c'4
> >>> |
> >>> \once \set Staff.whichBar = "|"
> >>> }
> >>>
> >>> \layout {
> >>>
> >>> \context {\Score
> >>> measureBarType=#""
> >>> }
> >>>
> >>> }
> >>> }
> >>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> >>>
> >>>
> >>> Now the first solution outputs:
> >>>
> >>> Processing `irr1.ly'
> >>> Parsing...
> >>> Interpreting music...
> >>> irr1.ly:13:1: warning: strange time signature found: 4/5
> >>>
> >>> \time 4/5
> >>> Preprocessing graphical objects...
> >>>
> >>>
> >>> Which looks good to me as a warning
> >>>
> >>> However, the second solution gives:
> >>>
> >>> Processing `irr2.ly'
> >>> Parsing...
> >>> Interpreting music...
> >>> warning: type check for `measureLength' failed; value `(ly:make-moment
> >>> 16/25)' must be of type `moment'
> >>> irr2.ly:12:1: warning: strange time signature found: 4/5
> >>>
> >>> \time 4/5
> >>> irr2.ly:20:1: warning: barcheck failed at: 1/5
> >>>
> >>> |
> >>> Preprocessing graphical objects...
> >>>
> >>>
> >>> And if we comment measureBarType=#"" we will have a strange bar at the
> >>> end.
> >>>
> >>>
> >>> Best Regards
> >>>
> >>>
> >>> --
> >>> Karim Haddad
> >>>
> >>> Music Representations Team, IRCAM
> >>> Research and development manager.
> >>>
> >>>
> >>
> >
> > --
> > Karim Haddad
> >
> > Music Representations Team, IRCAM
> > Research and development manager.
> >
>
--
Karim Haddad
Music Representations Team, IRCAM
Research and development manager.
email : karim.had...@ircam.fr
webpage : http://karim.haddad.free.fr
