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Why do we call the basic oscillators by "circle, triangle, square, rectangle, sawtooth"?

4 years ago Accepted AvailableLanguage: English
Why do we call the basic oscillators by "circle, triangle, square, rectangle, sawtooth"?
  • The oscillators visually look like these shapes. (Good work.)
  • The oscillators sound like these shapes. (What does a shape sound like?)
  • The oscillators were named after their inventors. (I've not heard of a ... Mr. Sawtooth ... before.)
  • There is no correlation, these are just names. (There is a common reason for the naming.)
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