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A440

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Under the A440 pitch standard, the musical note A above middle C corresponds to exactly 440 Hz (440 vibrations per second), and all other notes are based on fixed intervals from this note (for instance, the "A" below middle C is 220 Hz, and the E above middle C is, in twelve-tone equal temperament, approximately 329.628 Hz, but not quite 330 Hz, which is the price of abandoning just intonation).

A440 has been used here and there since the mid-19th century. The ISO adopted it as a standard in 1955, and affirmed it again in 1975, but A440 is more of a loose consensus than a legal requirement. Many musicians use it, and many others use something else - for example, A443 is commonly used by orchestras in some European countries, such as Austria and Germany. A few rock and pop tracks, such as "Baba O'Riley" by The Who, are known for being tuned slightly sharp or flat, requiring a guitarist to tune to a different standard to play along. Pitch standard is not a natural law, nor is it a law of the land.

Some sensitive souls are deeply concerned that humanity is driving a wedge between ourselves and our true cosmic nature when we tune our music to this convenient frequency.

A little history[edit]

Before A440 became common, musicians tuned instruments to a wide variety of pitch standards, including A432, A435, A444, C256, C528, or A417 (and some musicians still use these tunings today.) The first attempt to standardize tuning was Austria's recommendation of A435, and in 1936, the USA standardized A440. Since 1955, the International Organization of Standardization has implemented A440 as the global standard for pitch.[1] While most American and many European musicians use A440, some still tune their instruments (and voices) to whatever they like best, or according to the preference of their musical director. If a group includes a fixed-pitch instrument such as a piano, xylophone, or accordion, the group may tune to that.[2]

Conspiracy theories and woo[edit]

Crank websites and books have stated many wild and pseudoscientific claims about A440.

  • It disagrees with the "vibratory nature of the universe," whatever that means.
  • It leads to stress, aggression, and antisocial behavior in humans. While difference in intonation between instruments heard simultaneously will usually annoy someone, asserting a natural psychological preference for any particular absolute reference is just plain nonsensical.
  • It was created by Nazi propagandists to brainwash people.[3]
  • Other standards (like the so-called "Solfeggio frequencies"[4]) align better with DNA, phi, light, time, gravity, and other things that have nothing to do with sound.[5]

Some websites even claim that non-440 standards, usually A432 or C528 (which is roughly A444), can heal the body or repair DNA.[6][7]

There is even a service, called 528records, that sells music that has been converted to C528.[8] That this conversion is easily within reach of a child with some basic sound editing tools and a calculator[9] is apparently ignored.

The bottom line[edit]

When listening to music, most human beings do not perceive actual pitches; we perceive the intervals between them. What is called "perfect pitch" is most often relative pitch, or sensitivity to those musical intervals. A few people with absolute pitch may be able to tell the difference between 440 hertz and 444 hertz tones heard in isolation, but when listening to music on an everyday basis, even they may not notice. Woo-meisters, pushing a 440 conspiracy, have misinformed people about how pitch works, and have scammed whoever paid to have music converted to "solfeggio frequencies."

See also[edit]

External links[edit]

References[edit]

  1. Historical references concerning 440Hz as Concert Pitch
  2. The tuning of many so-called "fixed-pitch" instruments does in fact vary depending on temperature and humidity — and in many cases, in the opposite of the way in which that of wind instruments does. Fun.
  3. 440Hz Music—Conspiracy to Detune Us From Natural 432Hz Harmonics?
  4. Note that "solfeggio" or solfègeWikipedia's W.svg is a non-woo musical term for teaching musical notes with words; "do-re-mi" is an example. How this was adopted for a conspiracy theory is another matter. This article gives a detailed explanation of why Leonard Horowitz's "Solfeggio frequencies" are rubbish, with a lesson on music history and music theory to boot.
  5. solfeggiotones.com
  6. For example Attuned vibrations
  7. In vitro studies "produced a large unwinding effect on DNA."
  8. 528records.com
  9. Open file in Audacity, go Effects->Speed, enter "0.908" in the Percent Change.