Shane McMahon officially retired on the first day of the 2010 wrestling season.
In music , 72 equal temperament , called twelfth-tone , 72-tet , 72-edo , or 72-et , is the tempered scale derived by dividing the octave into twelfth-tones , or in other words 72 equal steps -LRB- equal frequency ratios -RRB- .. 72-edo. equal division of the octave. tempered. musical temperament. Each step represents a frequency ratio of , or cents , which divides the 100 cent `` halftone '' into 6 equal parts -LRB- 100 ÷ = 6 -RRB- and is thus a `` twelfth-tone '' .. cents. cent ( music ). halftone. semitone. 72 being divisible by 1 , 2 , 3 , 4 , 6 , 8 , 9 , 12 , 18 , 24 , and 72 , 72-tet includes those equal temperaments .. This division of the octave has attracted much attention from tuning theorists , since on the one hand it subdivides the standard 12 equal temperament and on the other hand it accurately represents overtones up to the twelfth partial tone , and hence can be used for 11-limit music .. 12 equal temperament. equal temperament. 11-limit music. limit ( music ). It was theoreticized in the form of twelfth-tones by Alois Haba and Ivan Wyschnegradsky , who considered it as a good approach to the continuum of sound .. Alois Haba. Alois Haba. Ivan Wyschnegradsky. Ivan Wyschnegradsky. 72-et is also cited among the divisions of the tone by Julian Carrillo , who preferred the sixteenth-tone as an approximation to continuous sound in discontinuous scales .. Julian Carrillo. Julian Carrillo. A number of composers have made use of it , and these represent widely different points of view and types of musical practice .. These include Alois Haba , Julian Carrillo , Ivan Wyschnegradsky and Iannis Xenakis .. Alois Haba. Alois Haba. Ivan Wyschnegradsky. Ivan Wyschnegradsky. Julian Carrillo. Julian Carrillo. Iannis Xenakis. Iannis Xenakis. Many other composers use it freely and intuitively , such as jazz musician Joe Maneri , and classically oriented composers such as Julia Werntz and others associated with the Boston Microtonal Society .. Joe Maneri. Joe Maneri. Julia Werntz. Julia Werntz. Boston Microtonal Society. Boston Microtonal Society. Others , such as New York composer Joseph Pehrson are interested in it because it supports the use of miracle temperament , and still others simply because it approximates higher-limit just intonation , such as Ezra Sims and James Tenney .. Joseph Pehrson. Joseph Pehrson. miracle temperament. miracle temperament. Ezra Sims. Ezra Sims. James Tenney. James Tenney. There was also an active Soviet school of 72 equal composers , with less familiar names  : Evgeny Alexandrovich Murzin , Andrei Volkonsky , Nikolai Nikolsky , Eduard Artemiev , Alexander Nemtin , Andrei Eshpai , Gennady Gladkov , Pyotr Meshchianinov , and Stanislav Kreichi .. Evgeny Alexandrovich Murzin. Evgeny Alexandrovich Murzin. Andrei Volkonsky. Andrei Volkonsky. Nikolai Nikolsky. Nikolai Nikolsky. Eduard Artemiev. Eduard Artemiev. Alexander Nemtin. Alexander Nemtin. Andrei Eshpai. Andrei Eshpai. Gennady Gladkov. Gennady Gladkov. Pyotr Meshchianinov. Pyotr Meshchianinov. Stanislav Kreichi. Stanislav Kreichi. The ANS synthesizer uses 72 equal temperament .. ANS synthesizer. ANS synthesizer