% you to precede \keyword by a backslash: \
\music {
\clef "bass"
- \octave { ` } % default \octave: 1 below the first \octave.
+ \octave { ' } % default \octave: 1 below the first \octave.
%%% theme
- `c % ` means one \octave lower.
+ 'c % ' means one \octave lower.
% Similarly: ' means one higher.
- c e c f c e c d `b c `a `f `g `c2
- \octave { ` }
- e `g d `g c `g `b `g e `g d `g c `g `b `g
+ c e c f c e c d 'b c 'a 'f 'g 'c2
+ \octave { ' }
+ e 'g d 'g c 'g 'b 'g e 'g d 'g c 'g 'b 'g
%%%% var 1
r8 e8() c r8 e8() c r8 f8()c r8 e8()c
- r8 d8()`b r8 c8()`a r8 `a8()`f r8 `e8()`c
+ r8 d8()'b r8 c8()'a r8 'a8()'f r8 'e8()'c
}