> Thank you for this. One question: is the second clef the size of a "change > clef" ? The reason I chose LSR 792 over 956 is the size of the second clef.
Yes. See for example \relative c' { %% Start with a bass clef : \clef bass %% Use a hidden grace note: \once\hideNotes\grace c64 %% Adjust the clef spacing: \once\override Staff.Clef.X-extent = #'(1 . 2) %% Put in the treble clef: \clef treble c4 \clef bass c \clef treble c c | c1 } This one does in fact create an actual clef, which is then of course a change clef. But then it is fiddly (you need to adjust extent of the clef) and causes the infamous start-on-grace issues. So I do think integrating this properly is the way to go.
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