Thanks. I'll add this information to the NR.
Right now, the NR says the following (https://lilypond.org/doc/v2.24/Documentation/notation/the-midi-block.html). What do you think needs to be clarified?
To create a MIDI output file from a LilyPond input file, insert a\midi
block, which can be empty, within the \score
block;
\score { … music … \layout { } \midi { } }