Provides note frequencies for equal-tempered scale.
Available on NPM.
CommonJS-ready or standalone
With NodeJS or browserify:
var AudioNotes = require("audio-notes");
With standalone script embedding:
var AudioNotes = window.AudioNotes;
You can access notes with two conventions:
by note name
You can access the note frequency with its name (English notation).
Major notes use a upper-case where minor (sharp) notes use the lower-case convention. Then we add the octave number.
AudioNotes.A4 is a A (la in solfège) of the 4th octave (A4 is 440 Hz).
AudioNotes.a4 is a A# (la# in solfège) of the 4th octave (A4 is ~ 466.16 Hz).
The 12 notes of one octaves are:
C c D d E F f G g A a B.
by MIDI value
You can also access a note by index:
AudioNotes is the 57th notes of a midi keyboard, it is A4 .