On Thu, Oct 21, 2021 at 1:22 PM David Kastrup <
dak@gnu.org> wrote:
Paolo Prete <paolopr976@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
With regard to the latter (which you could access in callbacks or
\applyContext) \tempo sets the context variable tempoWholesPerMinute in
the Score context. How this relates to X and Y depends on the unit of
the beat. A reasonable guess is it is measured in baseMoment beats,
possibly multipled by the gcd of the values in beatStructure (if any).
At least that's what Time_signature_performer tries to state.
unfortunately this doesn't sound trivial to achieve, and I presume that tempoWholesPerMinute is not in the API.
Then I wonder if it's preferable to override the \tempo function by setting two custom vars
thanks,
P
--
David Kastrup