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  2. Piano key frequencies - Wikipedia

    en.wikipedia.org/wiki/Piano_key_frequencies

    Values in bold are exact on an idealized standard piano. Keys shaded gray are rare and only appear on extended pianos. The normal 88 keys were numbered 1–88, with the extra low keys numbered 89–97 and the extra high keys numbered 98–108. A 108-key piano that extends from C 0 to B 8 was first built in 2018 by Stuart & Sons. [4]

  3. Note value - Wikipedia

    en.wikipedia.org/wiki/Note_value

    A note value may be augmented by adding a dot after it. This dot adds the next briefer note value, making it one and a half times its original duration. A number of dots ( n ) lengthen the note value by ⁠ 2 n − 1 / 2 n ⁠ its value, so two dots add two lower note values, making a total of one and three quarters times its original duration.

  4. 12 equal temperament - Wikipedia

    en.wikipedia.org/wiki/12_equal_temperament

    12-tone equal temperament chromatic scale on C, one full octave ascending, notated only with sharps. Play ascending and descending ⓘ. 12 equal temperament (12-ET) [a] is the musical system that divides the octave into 12 parts, all of which are equally tempered (equally spaced) on a logarithmic scale, with a ratio equal to the 12th root of 2 (≈ 1.05946).

  5. Equal temperament - Wikipedia

    en.wikipedia.org/wiki/Equal_temperament

    12 tone equal temperament chromatic scale on C, one full octave ascending, notated only with sharps. Play ascending and descending ⓘ. An equal temperament is a musical temperament or tuning system that approximates just intervals by dividing an octave (or other interval) into steps such that the ratio of the frequencies of any adjacent pair of notes is the same.

  6. Pythagorean tuning - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_tuning

    This succession of eleven 3:2 intervals spans across a wide range of frequency (on a piano keyboard, it encompasses 77 keys). Since notes differing in frequency by a factor of 2 are perceived as similar and given the same name ( octave equivalence ), it is customary to divide or multiply the frequencies of some of these notes by 2 or by a power ...

  7. Musical notation - Wikipedia

    en.wikipedia.org/wiki/Musical_notation

    Some instruments, such as piano and pipe organ, regularly use both treble and bass clefs. Following the clef, the key signature is a group of 0 to 7 sharp ( ♯ ) or flat ( ♭ ) signs placed on the staff to indicate the key of the piece or song by specifying that certain notes are sharp or flat throughout the piece, unless otherwise indicated ...

  8. Just intonation - Wikipedia

    en.wikipedia.org/wiki/Just_intonation

    One can have more frets on a guitar (or keys on a piano) to handle both As, 9:8 with respect to G and 10:9 with respect to G so that A→C can be played as 6:5 while A→D can still be played as 3:2. 9:8 and 10:9 are less than ⁠ 1 / 53 ⁠ of an octave apart, so mechanical and performance considerations have made this approach extremely rare.

  9. Fundamental frequency - Wikipedia

    en.wikipedia.org/wiki/Fundamental_frequency

    In music, the fundamental is the musical pitch of a note that is perceived as the lowest partial present. The fundamental may be created by vibration over the full length of a string or air column, or a higher harmonic chosen by the player.

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