![]() ![]() A few rock and pop tracks, such as "Baba O'Riley" by The Who or "The Battle of Evermore" by Led Zeppelin, are known for being tuned slightly sharp or flat, requiring a guitarist to tune to a different standard to play along. 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. 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. Tuning systems that sound different from 12-tone equal temperament may be called microtonal or xenharmonic.Ī440 has been used here and there since the mid-19 th century. ![]() ![]() Those who use other tuning systems may and often do use them with A440, though not always. deriding 12-tone equal temperament and insisting on a specific just intonation, but for reasons apart from the usual musical preferences and choices. 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.Ī related though distinct form of crankery would be to insist that among tuning systems, which specify the intervals between notes, some are mystically wholesome and others not, e.g. 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 12-tone equal temperament, approximately 329.628 Hz, but not quite 330 Hz, which is the price of abandoning just intonation ). ![]()
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