piano-key v2.1.1

Piano-key

Tools for working with piano keys and frequencies.

var key = require('piano-key');

key.getName(49);				//A4
key.getFrequency(49);			//440
key.getFrequency('A4');			//440
key.getNumber('A4');			//49
key.getNumber(440);				//49
key.getOctave(49);				//4
key.getNote(50);				//A#
key.getNote('A#4');				//A#

key.isBlack(49);				//false
key.isBlack(48);				//true