This reminded me of Hans Keller's wordless functional musical analysis. I came across it listening to his documentary on Schoenberg, available here: https://archive.org/download/miscellaneous_plays_1983-02-07_...

"Keller would construct an analysis in the form of an analytic score written for the same forces as the work under consideration and structured as a succession of 'analytic interludes' designed to be played between its movements."[1]

[1] https://www.artandpopularculture.com/Wordless_functional_ana...