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- A440_(pitch_standard) abstract "A440 or A4, which has a frequency of 440 Hz, is the musical note A above middle C and serves as a general tuning standard for musical pitch.Prior to the standardization on 440 Hz, many countries and organizations followed the Austrian government's 1885 recommendation of 435 Hz, which had also been the French standard since the 1860s. The American music industry reached an informal standard of 440 Hz in 1926, and some began using it in instrument manufacturing. In 1936 the American Standards Association recommended that the A above middle C be tuned to 440 Hz. This standard was taken up by the International Organization for Standardization in 1955 (reaffirmed by them in 1975) as ISO 16. Although not universally accepted, since then it has served as the audio frequency reference for the calibration of acoustic equipment and the tuning of pianos, violins, and other musical instruments.It is designated A4 in scientific pitch notation because it occurs in the octave that starts with the fourth C key on a standard 88-key piano keyboard. On MIDI, it is note 69.A440 is widely used as concert pitch in the United Kingdom and the United States. In continental Europe the frequency of A commonly varies between 440 Hz and 444 Hz. In the period instrument movement, a consensus has arisen around a modern baroque pitch of 415 Hz (A♭ of A440), baroque for some special church music (Chorton pitch) at 466 Hz (A♯ of A440), and classical pitch at 430 Hz.The A above middle C is sometimes referred to as Concert A. (The C above Concert A is called Concert C.)A440 is often used as a tuning reference in just intonation regardless of 1/1 or key. For example, A is common to all stringed instruments.The US time and frequency station WWV broadcasts a 440 Hz signal at two minutes past every hour, with WWVH broadcasting the same tone at first minutes past every hour. This was added in 1936 to aid orchestras in tuning their instruments.".
- A440_(pitch_standard) soundRecording A440_(pitch_standard)__1.
- A440_(pitch_standard) thumbnail A440.png?width=300.
- A440_(pitch_standard) wikiPageID "424924".
- A440_(pitch_standard) wikiPageLength "4050".
- A440_(pitch_standard) wikiPageOutDegree "32".
- A440_(pitch_standard) wikiPageRevisionID "699871859".
- A440_(pitch_standard) wikiPageWikiLink A_(musical_note).
- A440_(pitch_standard) wikiPageWikiLink American_National_Standards_Institute.
- A440_(pitch_standard) wikiPageWikiLink Austria.
- A440_(pitch_standard) wikiPageWikiLink C_(musical_note).
- A440_(pitch_standard) wikiPageWikiLink Category:Musical_tuning.
- A440_(pitch_standard) wikiPageWikiLink Concert_pitch.
- A440_(pitch_standard) wikiPageWikiLink Electronic_tuner.
- A440_(pitch_standard) wikiPageWikiLink Frequency.
- A440_(pitch_standard) wikiPageWikiLink Hertz.
- A440_(pitch_standard) wikiPageWikiLink International_Organization_for_Standardization.
- A440_(pitch_standard) wikiPageWikiLink Just_intonation.
- A440_(pitch_standard) wikiPageWikiLink Key_(music).
- A440_(pitch_standard) wikiPageWikiLink List_of_period_instruments.
- A440_(pitch_standard) wikiPageWikiLink MIDI.
- A440_(pitch_standard) wikiPageWikiLink Musical_note.
- A440_(pitch_standard) wikiPageWikiLink Ogg.
- A440_(pitch_standard) wikiPageWikiLink Piano.
- A440_(pitch_standard) wikiPageWikiLink Pitch_(music).
- A440_(pitch_standard) wikiPageWikiLink Scientific_pitch_notation.
- A440_(pitch_standard) wikiPageWikiLink Sine_wave.
- A440_(pitch_standard) wikiPageWikiLink Twelfth_root_of_two.
- A440_(pitch_standard) wikiPageWikiLink United_Kingdom.
- A440_(pitch_standard) wikiPageWikiLink United_States.
- A440_(pitch_standard) wikiPageWikiLink WWVH.
- A440_(pitch_standard) wikiPageWikiLink WWV_(radio_station).
- A440_(pitch_standard) wikiPageWikiLink File:A440.png.
- A440_(pitch_standard) wikiPageWikiLink File:Piano_Frequencies.svg.
- A440_(pitch_standard) wikiPageWikiLinkText "440 Hz (A440)".
- A440_(pitch_standard) wikiPageWikiLinkText "440 Hz".
- A440_(pitch_standard) wikiPageWikiLinkText "440".
- A440_(pitch_standard) wikiPageWikiLinkText "440 Hz".
- A440_(pitch_standard) wikiPageWikiLinkText "440Hz".
- A440_(pitch_standard) wikiPageWikiLinkText "A 440".
- A440_(pitch_standard) wikiPageWikiLinkText "A = 440 Hz".
- A440_(pitch_standard) wikiPageWikiLinkText "A = 440".
- A440_(pitch_standard) wikiPageWikiLinkText "A-440".
- A440_(pitch_standard) wikiPageWikiLinkText "A220".
- A440_(pitch_standard) wikiPageWikiLinkText "A4".
- A440_(pitch_standard) wikiPageWikiLinkText "A440 (pitch standard)".
- A440_(pitch_standard) wikiPageWikiLinkText "A440 pitch standard".
- A440_(pitch_standard) wikiPageWikiLinkText "A440".
- A440_(pitch_standard) wikiPageWikiLinkText "A=440 Hz".
- A440_(pitch_standard) wikiPageWikiLinkText "A=440".
- A440_(pitch_standard) wikiPageWikiLinkText "International A".
- A440_(pitch_standard) wikiPageWikiLinkText "concert A at 440 Hz".
- A440_(pitch_standard) wikiPageWikiLinkText "pitch correction".
- A440_(pitch_standard) wikiPageWikiLinkText "standard concert pitch".
- A440_(pitch_standard) wikiPageWikiLinkText "standard musical note ''A''".
- A440_(pitch_standard) wikiPageWikiLinkText "standard tuning".
- A440_(pitch_standard) wikiPageWikiLinkText "tuning note".
- A440_(pitch_standard) description "3.0".
- A440_(pitch_standard) filename "Sine wave 440.ogg".
- A440_(pitch_standard) format Ogg.
- A440_(pitch_standard) title "A440".
- A440_(pitch_standard) wikiPageUsesTemplate Template:!.
- A440_(pitch_standard) wikiPageUsesTemplate Template:Audio.
- A440_(pitch_standard) wikiPageUsesTemplate Template:For.
- A440_(pitch_standard) wikiPageUsesTemplate Template:ISO_standards.
- A440_(pitch_standard) wikiPageUsesTemplate Template:Listen.
- A440_(pitch_standard) subject Category:Musical_tuning.
- A440_(pitch_standard) hypernym Note.
- A440_(pitch_standard) type Software.
- A440_(pitch_standard) type Thing.
- A440_(pitch_standard) comment "A440 or A4, which has a frequency of 440 Hz, is the musical note A above middle C and serves as a general tuning standard for musical pitch.Prior to the standardization on 440 Hz, many countries and organizations followed the Austrian government's 1885 recommendation of 435 Hz, which had also been the French standard since the 1860s. The American music industry reached an informal standard of 440 Hz in 1926, and some began using it in instrument manufacturing.".
- A440_(pitch_standard) label "A440 (pitch standard)".
- A440_(pitch_standard) sameAs Q2610210.
- A440_(pitch_standard) sameAs La_440.
- A440_(pitch_standard) sameAs La_440.
- A440_(pitch_standard) sameAs ایزو_۱۶.
- A440_(pitch_standard) sameAs La440.
- A440_(pitch_standard) sameAs A440.
- A440_(pitch_standard) sameAs ISO_16.
- A440_(pitch_standard) sameAs A440.
- A440_(pitch_standard) sameAs Lá_440.
- A440_(pitch_standard) sameAs m.026y2s.
- A440_(pitch_standard) sameAs Q2610210.
- A440_(pitch_standard) sameAs A440.
- A440_(pitch_standard) wasDerivedFrom A440_(pitch_standard)?oldid=699871859.
- A440_(pitch_standard) depiction A440.png.
- A440_(pitch_standard) isPrimaryTopicOf A440_(pitch_standard).