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 <[email protected]>: > > > > 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.
