Equal temperament is a system of tuning in which every pair of adjacent notes has an identical frequency ratio.

In equal temperament tunings an octave is divided into a series of equal "steps" i.e. equal frequency ratios, ascending in a geometric progression.

It is the present standard method of dividing the any octave of frequencies. Thus, the 12 steps we get are the 12 notes - A A# B C C# D D# E F F# G and G#, the following A being the 1st note of the next octave (double in frequency of the previous lower A).

http://basicmusictheory.blogspot.com/2009/04/what-is-it-12-tet.html

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## Comments: 2 comment(s)...have your say!

interesting

it is very interesting.

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