Parallel notation and volta repeats

Hey y’all, I’m trying to write music in parallel but the thing that’s always stopped me was that I can’t figure out how to use it with volta repeats

Mapping pitches to other pitches when generating MIDI files for percussion?

Hey y’all, TLDR: I need to map different pitches displayed in the layout block / PDF file to a single sound in the midi block / file (like say map both c and a to b,) but I can’t to that to the whole staff — I need to be able to map other sets of pitches to another single sound. Can Lilypond

Is there a way to generate a QR code inside a \markup block?

Hi everybody, I’m making a huge manual for my group with dozens of pages full of QR codes pointing to examples on YouTube and whatnot. For the time being I’m inserting them via \epsfile, but then I have to generate, properly name and organize each one beforehand. It takes much longer than