For comments or suggestions, please send emails to . The Online Tone Generator uses the recently developed HTML5 Web Audio API. It is currently compatible with most modern desktop browsers, although Internet Explorer is not yet supported. More details can be found in the Web Audio working draft.
All frequencies on this site were calculated using equal temperament with a reference of A4 = 440Hz. All semitones have a frequency ratio of the twelfth root of two. See Wikipedia's entry on equal temperament for more details.
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