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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).

  3. Scientific pitch - Wikipedia

    en.wikipedia.org/wiki/Scientific_pitch

    Scientific pitch, also known as philosophical pitch, Sauveur pitch or Verdi tuning, is an absolute concert pitch standard which is based on middle C (C 4) being set to 256 Hz rather than ~ 261.63 Hz, [a] making it ~ 31.77 cents lower than the common A440 pitch standard.

  4. Concert pitch - Wikipedia

    en.wikipedia.org/wiki/Concert_pitch

    Concert pitch rose further in the 19th century, evidenced by tuning forks of that era in France. The pipe organ tuning fork in Versailles Chapel from 1795 is 390 Hz, [7] an 1810 Paris Opera tuning fork sounds at A = 423 Hz, an 1822 fork gives A = 432 Hz, and an 1855 fork gives A = 449 Hz. [8]

  5. List of audio conversion software - Wikipedia

    en.wikipedia.org/wiki/List_of_audio_conversion...

    An audio conversion app (also known as an audio converter) transcodes one audio file format into another; for example, from FLAC into MP3.It may allow selection of encoding parameters for each of the output file to optimize its quality and size.

  6. Svara - Wikipedia

    en.wikipedia.org/wiki/Svara

    Madhya Saptak: 240 Hz, 270 Hz, 288 Hz, 320 Hz, 360 Hz, 405 Hz, 432 Hz.} Taara Saptak: 480 Hz, 540 Hz, 576 Hz, 640 Hz, 720 Hz, 810 Hz, 864 Hz.} All the other svara s except Shadaj (Sa) and Pancham (Pa) can be komal or tivra svara s but Sa and Pa are always shuddha svara s.

  7. Frequency conversion - Wikipedia

    en.wikipedia.org/wiki/Frequency_conversion

    Frequency conversion may refer to different processes affecting frequency of physical phenomena: . A frequency changer, an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency

  8. Talk:432 Hz - Wikipedia

    en.wikipedia.org/wiki/Talk:432_Hz

    The information in the specific section Concert_pitch#Controversial_claims_for_432_Hz first redirected to was not a good representation of the subject. 432 Hz is not only a controversial claim, but also has uncontroversial historical use. Much more info on explicitly 432 Hz exist in both articles Concert pitch and Scientific pitch.

  9. Mel scale - Wikipedia

    en.wikipedia.org/wiki/Mel_scale

    Plots of pitch mel scale versus hertz scale A440 Play ⓘ. 440 Hz = 549.64 mels. The mel scale (after the word melody) [1] is a perceptual scale of pitches judged by listeners to be equal in distance from one another.