On Thu, Oct 21, 2021 at 2:01 PM David Kastrup <d...@gnu.org> wrote: > Paolo Prete <paolopr...@gmail.com> writes: > > > On Thu, Oct 21, 2021 at 1:22 PM David Kastrup <d...@gnu.org> wrote: > > > >> Paolo Prete <paolopr...@gmail.com> writes: > >> > >> > Hello, > >> > > >> > after a \tempo X = Y is set, is there a way (a scheme function or > >> > variable?) to get X and Y? > >> > >> What does "after" mean and "is set"? At a later point in the source > >> text, at a later time in musical execution? > >> > >> > > yes > > Those are two different things entirely. "yes" as an answer is not > suitable. >
Sorry, I used a bad quote of the text. With "yes" I mean "at a later point in the source text". > > > unfortunately this doesn't sound trivial to achieve, and I presume that > > tempoWholesPerMinute is not in the API. > > I have no idea what you mean by "is not in the API". What is the API > according to your definition? > > API is the public interface exposed to the user. I assumed that tempoWholesPerMinute was internal stuff, but I just checked that it IS in the API: https://lilypond.org/doc/v2.22/Documentation/internals/tempo_005fperformer Anyway, I don't know if it fits what I need. More specifically, I'm trying to obtain in the midi output the behavior of growing beams (Beam.grow-direction). For example, a sort of accelerando from a fixed metronome (which is not the previous metronome mark). After the beam, the metronome must be reset to the initial value. For example: %%%%%%%%%%%%%%%%%%% { \tempo 4 = 120 c'4 \override Beam.grow-direction = #RIGHT %start from \tempo 4 = 40 c'16[ % \tempo 4 = 40 + 20% c' % \tempo 4 = 40 + 40% c' % \tempo 4 = 40 + 60% c'] %reset \tempo to 4 = 120 c'4 } %%%%%%%%%%%%%%%%%%% I already wrote a Scheme function that increases a tempo by 20% for each note grouped by the beam, starting from a chosen value, but I don't know how to reset the tempo after the beam. thanks, P
