;; for historical reasons
(n (ly:pitch-notename p)))
(cond
- ((and (> a 1) (or (= n 6) (= n 2)))
+ ((and (> a 1) (or (eq? n 6) (eq? n 2)))
(set! a (- a 2))
(set! n (+ n 1)))
- ((and (< a -1) (or (= n 0) (= n 3)))
+ ((and (< a -1) (or (eq? n 0) (eq? n 3)))
(set! a (+ a 2))
(set! n (- n 1))))
(cond