Function: math-freq-to-midi

math-freq-to-midi is a byte-compiled function defined in calc-units.el.gz.

Signature

(math-freq-to-midi FREQ)

Documentation

Return the midi note number corresponding to FREQ Hz.

Source Code

;; Defined in /usr/src/emacs/lisp/calc/calc-units.el.gz
(defun math-freq-to-midi (freq)
  "Return the midi note number corresponding to FREQ Hz."
  (let ((midi (math-add
               69
               (math-mul
                12
                (calcFunc-log
                 (math-div freq 440)
                 2)))))
    (math-midi-round midi)))