-\context Staff {
- \property Staff.keySignature = #'(((1 . 2) . 1) ((0 . 3) . -1))
- f8 a c e
- \property Staff.keySignature = #'(((1 . 2) . -1) ((0 . 4) . 2))
- e a, g a
-}
+\new Staff {
+ \set Staff.keySignature = #`(((1 . 2) . ,SHARP) ((0 . 3) . ,FLAT))
+ f8 a c e
+ \set Staff.keySignature = #`(((1 . 2) . ,FLAT) ((0 . 4) . ,DOUBLE-SHARP))
+ e a, g a