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note

Function

 

(note freq {keyword value}*)

Returns the note name of freq, which can be a note name, key number, Hertz value or list of the same.

note supports the following keyword arguments:

:hz boolean
If true then a numerical freq is interpreted as a Hertz value rather than as a key number.
:in { tuning | mode}
The tuning or mode to return the note from. The default value is *scale*. If a mode is specified then freq must be a modal key number.
:in? { tuning | mode}
Tests if freq references a note name in the specified tuning or mode. Returns the note name or false.
:through mode
Filters freq through mode and returns the closest note.

Examples

;; Converting key numbers and Hertz values to notes.
(note 440 :hz #t)
⇒ a4
(note 60)
⇒ c4
(note '(c4 d e1 f g5 ef f))
⇒ (c4 d4 e1 f1 g5 ef5 f5)
;; Modes and notes.
(define octatonic (new mode :notes '(c d ef f fs gs a b c)))

(note 'cs4 :in? octatonic)
⇒ #f
(note 'ef4 :in? octatonic)
⇒ ef4
(loop for k from 35 repeat 8 collect (note k :in octatonic))
⇒ (c4 d4 ef4 f4 g4 af4 bf4 c5)
(loop repeat 10 for n = (between 60 72) 
      collect (note n :through octatonic))
⇒ (af4 f4 d4 af4 c4 c4 af4 c4 bf4 c4)

See also