Re: Pitch value of previous note

[Mark Knoop]

At 12:15 on 30 Apr 2021, David Kastrup wrote:
> David Sumbler <david@aeolia.co.uk> writes:
> > How can I access the pitch value of this most recent note for use in a
> > Scheme function after some rests?
>
> Other value-propating mechanisms exist for default durations (attached
> by the parser upon reading expressions), pitch-less durations (added
> during the scorifying stage when a music expression is accepted into a
> \score block), chord repeats (also at scorification).
>
> "For use in a Scheme function" is too hand-waving to have an idea which
> phase of LilyPond's interpretation you would want to be interfering
> with, so it would probably make more sense to present the problem you
> are trying to solve rather than guess about the tools you think LilyPond
> must be using internally.

I don't know what David (Sumbler)'s use-case is, but one could imagine in an 
analysis situation something like:

{ c'1 g'1-\intervalFunction }

where 'intervalFunction' created the markup string "Perfect 5th above previous 
pitch".

--
Mark Knoop