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2. Piano key frequencies - Wikipedia

   en.wikipedia.org/wiki/Piano_key_frequencies

   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). [1] [2] Every octave is made of twelve steps called semitones.

3. Musical keyboard - Wikipedia

   en.wikipedia.org/wiki/Musical_keyboard

   Download as PDF; Printable version; ... (frequency: 27.5 Hz) of an 88-key piano is equivalent to a sub contrabass in the range name. ... Some free-reed instrument ...

4. File:Piano Frequencies.svg - Wikipedia

   en.wikipedia.org/wiki/File:Piano_Frequencies.svg

   English: This is a 88 key piano layout with octaves illustrated and hovering that reveals the frequency for the key. (The numbered octaves are black on transparency. They will not show up if the image is displayed on a black background, such as if the background of your browser is set to black, or is black when you open images separately.)

5. A440 (pitch standard) - Wikipedia

   en.wikipedia.org/wiki/A440_(pitch_standard)

   An 88-key piano, with the octaves numbered and middle C (cyan) and A 4 (yellow) highlighted A440 is widely used as concert pitch in the United Kingdom [ 8 ] and the United States . [ 9 ] In continental Europe the frequency of A 4 commonly varies between 440 Hz and 444 Hz. [ 8 ]

6. Category:Piano - Wikipedia

   en.wikipedia.org/wiki/Category:Piano

   Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; Wikibooks; ... Piano key frequencies; Piano Lessons (book)

7. C (musical note) - Wikipedia

   en.wikipedia.org/wiki/C_(musical_note)

   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 [1] (for other notes see piano key frequencies). Scientific pitch was originally proposed in 1713 by French physicist Joseph Sauveur and based on the numerically convenient frequency of 256 Hz for middle C ...

8. Scientific pitch notation - Wikipedia

   en.wikipedia.org/wiki/Scientific_pitch_notation

   Scientific pitch notation is often used to specify the range of an instrument. It provides an unambiguous means of identifying a note in terms of textual notation rather than frequency, while at the same time avoiding the transposition conventions that are used in writing the music for instruments such as the clarinet and guitar.

9. Talk:Scientific pitch notation - Wikipedia

   en.wikipedia.org/wiki/Talk:Scientific_pitch_notation

   The table that is part of the article does assume this, and the article on piano key frequencies does too. But, if for example you choose to tune an organ to mean tone tuning, middle C is still C4, and the A above it is still A4. It may not be A440 however (depending on exactly how you've chosen to implement your mean tones).