12 Tone Equal Temperament (12TET)
Definitions:
Interval: The relationship between one note and another expressed in distance, or frequency.
Octave: An interval of a lower and higher version of the same note. Example: A4(440hz) and A5(880hz).
Question: Multiply A4(440hz) twelve times by what number to arrive at its Octave A5(880hz)?
Answer: The 12th Root of 2 = ^{ 12}√2 = 2^{1/12} = 1.0594630943592953...
