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  • Mark Lindley,
  • Murray Campbell
  •  and Clive Greated


The distance between two pitches. The term ‘harmonic interval’ (as opposed to ‘melodic interval’) indicates that they are thought of as being heard simultaneously. Intervals are traditionally labelled according to the number of steps they embrace in a diatonic scale, counted inclusively: thus from C up to D or down to B is a 2nd, another step up to E or down to A makes a 3rd, etc. These names are applied in non-diatonic contexts so that an interval embracing five degrees of a pentatonic scale is still called an octave (from Lat. ...

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