pitch argument for transpose function

[Robert Kubosz]

Hello!


I want to write a piece of code, that would automatically fill-in 
missing voices. Here is a snippet that represents what I want to accomplish:


\version "2.22.0"


voice-one = {c'}


#(define interval "c' b")

%this does not work
%\transpose function expects pitch as first argument,
%but unfortunately I have no idea how to provide it

voice-two = \transpose \interval \voice-one

{\voice-two}


Of course it throws errors.

Does somebody what to write to make it work?
I want to keep transpose intervals in scheme variables, because there is 
~24 voices and I want to keep the code maintainable.


Best regards

Robert Kubosz