I'm getting started using lilyjazz to write Jazz-styled music. I'd like to get the Realbook-like notation that I'm used to featuring a triangle to denote a major seven.
jazzchords.ily stylesheet comes in pretty handy, but I'm struggling to find a proper substitution for the "M":
% for major chords, use "acMaj" to print a small "M" #(define-markup-command (acMaj layout props extension) (string?) (interpret-markup layout props (markup #:super "M" #:super extension)))