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Portable Network Graphic  |  1994-04-28  |  4.6 KB  |  452x268  |  1-bit (2 colors)
   ocr: ABUUT INTERVALS An interval is the perceived distance between two pitches. If two pitches are identical they are in unison. If they belong to the same pitch-class then they are separated by one or more octaves. Since there are twelve Ditches within an octave there are twelve possible ntervals within an octave. The number association describing an nterval refers to the number of letter-names involved. A tol B or t to Cis a second even though they have different size intervals. At to - B is a whole step and B to C is a half step. A third always spans 31 letters, a fourth spans 4 letters and sO o ...