Stefan Thomas <kontrapunktste...@gmail.com> writes:
> Dear community,
> I would like to create related tempo marks. For example, in bar 1 I would
> like to have a tempo 4=60, some bars later tempo 4=90.
> The tempi are in the proportion 3/2. I would like to write something like
>
>> TempoA = {\tempo 4 =60}
>> TempoB = \TempoA*1.5
>>
> I want to create a midi-file with metronome clicks of a piece with many
> time signature and tempo changes and I want to practise with this file. I
> want to be able to practise in different tempi and I don't want to retype
> all the tempo changes again and again.
> Is it possible to define tempo-relations in scheme?
You can try for something like
\context Timing
\applyContext #(lambda (c)
(set! (ly:context-property c 'tempoWholesPerMinute)
(* 3/2 (ly:context-property c
'tempoWholesPerMinute))))
which is a Midi-only way of doing this.
--
David Kastrup
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