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Around 261.63 Hz
- For an instrument in equal temperament tuned to the A440 pitch standard widely adopted in 1939, middle C has a frequency around 261.63 Hz (for other notes see piano key frequencies).
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This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440).
Jan 9, 2020 · A number of calculations useful to builders of stringed musical instruments require the frequency or wavelength of a note as input data. The following table presents the frequencies of all notes in ten octaves to a thousandth of a hertz.
May 6, 2014 · Assumption #1: The octave around middle C (or C4) is roughly equal-tempered. Assumption #2: Due to the inharmonicity of the strings, each octave above or below middle C should be "stretched" incrementally wider than the preceding octave. Define a "stretch factor" s in semitones per octave.
- Yes, you are correct, the "true" frequencies will differ from piano to piano. In addition to the answers already given here, I would like to add mo...
- The figure in the Wikipedia article tells you what you are asking, if you're willing to tabulate the deviations by reading the green line. The ve...
- Are you asking this question because you're writing a synthesizer? That kind of detail will help the answer that you get... If you're working on a...
- The question is actually self-defeating. The problem is that the reason a piano gets stretched tuning in the first place is disharmonicity, meanin...
- As the question itself admits, there is no "true" mathematical answer to the question since the best tuning varies from piano to piano. But one ca...
- Just to expand on a point I think is important, and the reason I think learning frequencies is semi-useless: As supercat said in his comment @Dav...
- This chart displays the frequency of all notes: As a reference, 60 midi number = middle C on the piano. A piano has seperate strings for each note...
This list of frequencies is for a theoretically ideal piano. On an actual piano the ratio between semitones is slightly larger, especially at the high and low ends, where string stiffness causes inharmonicity, i.e., the tendency for the harmonic makeup of each note to run sharp.
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The piano has 88 keys which span the frequency range 27.5 Hz (A0) to 4186 Hz (C8). The strings are sounded by hammer mechanisms which are activated by the keys. The relatively soft hammer structure, fashioned from pressurized wool, gives a dramatic attack to the tone without sounding harsh.
Because pianos typically have multiple strings for each piano key, these strings must be tuned to the same frequency to eliminate beats. The pitch of a note is determined by the frequency of vibrations. For a vibrating string, the frequency is determined by the string's length, mass, and tension.
The frequency of that note is around 261 Hertz (Hz), which means it vibrates back and forth 261 times every second. Now, if you move up to the next key, which is C#, you'll notice that it vibrates at around 523 Hz – exactly double the frequency of C!
