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  2. Audio time stretching and pitch scaling - Wikipedia

    en.wikipedia.org/wiki/Audio_time_stretching_and...

    To achieve the actual time-scale modification, the analysis frames are then temporally relocated to have a synthesis hopsize. This frame relocation results in a modification of the signal's duration by a stretching factor of = /. However, simply superimposing the unmodified analysis frames typically results in undesired artifacts such as phase ...

  3. Pitch control - Wikipedia

    en.wikipedia.org/wiki/Pitch_control

    A variable speed pitch control (or vari-speed) is a control on an audio device such as a turntable, tape recorder, or CD player that allows the operator to deviate from a standard speed (such as 33, 45 or even 78 rpm on a turntable), resulting in adjustments in pitch. [1]

  4. Music and mathematics - Wikipedia

    en.wikipedia.org/wiki/Music_and_mathematics

    The lower note is a constant A (440 Hz in either scale), the upper note is a C ♯ in the equal-tempered scale for the first 1", and a C ♯ in the just intonation scale for the last 1". Phase differences make it easier to detect the transition than in the previous sample.

  5. Metronome - Wikipedia

    en.wikipedia.org/wiki/Metronome

    Maelzel's mechanical metronome uses an adjustable weight on an inverted pendulum rod to control tempo. The weight slides up the pendulum rod to decrease tempo, or down to increase tempo. (This mechanism is also called a double-weighted pendulum, because there is a second, fixed weight on the other side of the pendulum pivot, inside the ...

  6. Scale (music) - Wikipedia

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

    Scales are typically listed from low to high pitch. Most scales are octave-repeating, meaning their pattern of notes is the same in every octave (the Bohlen–Pierce scale is one exception). An octave-repeating scale can be represented as a circular arrangement of pitch classes, ordered by increasing (or decreasing) pitch class.

  7. Tempo - Wikipedia

    en.wikipedia.org/wiki/Tempo

    Although tempo is described or indicated in many different ways, including with a range of words (e.g., "Slowly", "Adagio", and so on), it is typically measured in beats per minute (bpm or BPM). For example, a tempo of 60 beats per minute signifies one beat per second, while a tempo of 120 beats per minute is twice as rapid, signifying two ...

  8. List of musical works in unusual time signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_works_in...

    This is a list of musical compositions or pieces of music that have unusual time signatures. "Unusual" is here defined to be any time signature other than simple time signatures with top numerals of 2, 3, or 4 and bottom numerals of 2, 4, or 8, and compound time signatures with top numerals of 6, 9, or 12 and bottom numerals 4, 8, or 16.

  9. Two hundred fifty-sixth note - Wikipedia

    en.wikipedia.org/wiki/Two_hundred_fifty-sixth_note

    Wolfgang Amadeus Mozart used 128th and 256th notes in his Variations on "Je suis Lindor", K. 354. Play ⓘ at =40 (=20). In music, a two hundred fifty-sixth note, or occasionally demisemihemidemisemiquaver (), [1] is a note played for 1 ⁄ 256 of the duration of a whole note.