Thank you Valentin, In fact i am now using the solution #1 which gives correct time settings. By the way i am using this in a "poly-metric" and "poly-tempic" context, and i must say it works good. Only possible in Lilypond. Thank you to all developpers and expert users for all your work and advice.
I am sorry i have unleashed an off topic disscussion, however, i appreciate all your remarks which testify of your passion to music, music theory and typesetting. Take care all of you. Best K On Wed, Jan 18, 2023 at 02:22:58PM +0100, Valentin Petzel wrote: > Hi Karim, > > 2) does not work as #'(ly:make-moment 16/25) is a symbol rather than > #(ly:make-moment > 16/25). Also (2) still needs \scaleDurations 4/5, unless you do > > \time 4/5 > \set Timing.measureLength = #(ly:make-moment 4/4) > > The idea behind the part > > https://lilypond.org/doc/v2.24/Documentation/snippets/rhythms#rhythms-changing-time-signatures-inside-a-polymetric-section-using-_005cscaledurations[1] > > in the documention is to change TimeSignature while having a scaled Duration, > so you > want to have an e.g. 4/4 time sig, but the Staff should be scaled by 4/5, so > you want the > measure length of a 4/5 timesig, thus you do 4/4 and manualy tell Lilypond > that you > actually want a length of 4/5. > > If you want to use something like 4/5 this is not of relevance to you. As I > said you could > change measure length to 4/4 and notate everything as if it were 4/4 though. > > Cheers, > Valentin > > Am Dienstag, 17. Jänner 2023, 12:16:43 CET schrieb Karim Haddad: > > 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 > > -- Karim Haddad Music Representations Team, IRCAM Research and development manager. email : karim.had...@ircam.fr webpage : http://karim.haddad.free.fr
