It's an available markup command, listed at https://lilypond.org/doc/v2.24/Documentation/notation/other Short version:
\markup { \eyeglasses }
--
Michael
- Spectacle sign Raphael Mankin
- Re: Spectacle sign Mike Andrews
- Re: Spectacle sign Michael Gerdau
- Re: Spectacle sign Michael Werner
- Re: Spectacle sign Raphael Mankin
