- Piano key frequencies
This is a virtual piano with 88 keys tuned to
A440 , showing the frequencies, in cycles per second (Hz), of each note (ie note frequencies of each note found on a standard piano). This distribution of frequencies is known asequal temperament , i.e. each successive pitch is derived by multiplying the previous by thetwelfth root of two . For example, A4 is normally tuned to 440 Hz. To get the next semitone (Amusic|#4), multiply 440 Hz by thetwelfth root of two . To go from A4 to B4 (up two semitones), multiply 440 by the twelfth root of two squared. For other tuning schemes refer toMusical tuning .This list of frequencies is for a theoretical ideal piano. On an actual piano the ratio between semitones is slightly larger, especially at the high and low ends, due to string thickness which causes
inharmonicity due to the nonzero force required to bend steelpiano wire even in the absence of tension. This effect is sometimes known asstretched octave s, and the pattern of deviation is called theRailsback curve .Virtual piano
ee also
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Piano tuning External links
* [http://web.archive.org/web/20070305040009/http://wiki.highinbcgallery.com/index.php/Almost_a_shape/technology/Piano_frequencies/Piano_frequency_table.pl Piano frequency table.pl] - A small GFDL perl script containing the information from the table on this page in a perl data structure.
* [http://shakahara.com/pianopitch2.php interactive piano frequency table] — A php script allowing the reference pitch of A49 to be altered from 440 Hz.
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