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  2. Piano key frequencies - Wikipedia

    en.wikipedia.org/wiki/Piano_key_frequencies

    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] (Note: these piano key numbers 1-108 are not the n keys in the equations or the table.)

  3. Memorylessness - Wikipedia

    en.wikipedia.org/wiki/Memorylessness

    The memorylessness property asserts that the number of previously failed trials has no effect on the number of future trials needed for a success. Geometric random variables can also be defined as taking values in N 0 {\displaystyle \mathbb {N} _{0}} , which describes the number of failed trials before the first success in a sequence of ...

  4. Musical keyboard - Wikipedia

    en.wikipedia.org/wiki/Musical_keyboard

    Because these keys receive less wear, they are often made of black colored wood and called the black notes or black keys. Black keys form a pentatonic scale. The entire pattern repeats at the interval of an octave. The arrangement of longer keys for C major with intervening, shorter keys for the intermediate semitones date to the 15th century.

  5. Markov property - Wikipedia

    en.wikipedia.org/wiki/Markov_property

    The term Markov assumption is used to describe a model where the Markov property is assumed to hold, such as a hidden Markov model. A Markov random field extends this property to two or more dimensions or to random variables defined for an interconnected network of items. [1] An example of a model for such a field is the Ising model.

  6. Key (music) - Wikipedia

    en.wikipedia.org/wiki/Key_(music)

    The key may be in the major or minor mode, though musicians assume major when this is not specified; for example "This piece is in C" implies that the key of the piece is C major. Popular songs and classical music from the common practice period are usually in one key. Longer pieces in the classical repertoire may have sections in contrasting keys.

  7. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  8. C major - Wikipedia

    en.wikipedia.org/wiki/C_major

    Of Franz Schubert's two symphonies in the key, the first is nicknamed the "Little C major" and the second the "Great C major". Scott Joplin's "The Entertainer" is written in C major. Many musicians have pointed out that every musical key conjures up specific feelings. [5] This idea is further explored in a radio program called The Signature Series.

  9. C (musical note) - Wikipedia

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

    C 4 (approximately 261.626 Hz [3]) may be called Low C by someone playing a Western concert flute, which has a higher and narrower playing range than the piano, while C 5 (523.251 Hz) would be middle C. This practice has led some to encourage standardizing on C 4 as the definitive middle C in instructional materials across all instruments. [4]