Timbre.js

system requirements: Chrome 14- or Firefox 4-

Converter

Example

// copy utils functions to the window object          
timbre.utils.exports("converter");

// A midi number to frequency
mtof(69);  // timbre.utils.mtof(69) is 440(Hz)


// A tone name to a midi number
atom("A4") // timbre.utils.atom("A4") is #81
atom("G#3") === atom("G+3") === atom("A-3") === atom("Ab3");

// A tone name to a frequency
atof("C5") // timbre.utils.atom("A4") is 1046.50(Hz)
 

// Others
bpm2msec(134, 8); // timbre.utils.bpm2msec
bpm2hz(134, 8);   // timbre.utils.bpm2hz
msec2bpm(320, 8); // timbre.utils.msec2bpm
msec2hz(250);     // timbre.utils.msec2hz