Description:
Plays any OM Musical object. 
 
<player> designates a particular player (t = dispatch automatically)  
<approx> sets the temperament (2, 4, 8) in the case of MIDI player 
<interval> allows to select a time interval to play '(begin[ms] end[ms]) 
<port> plays to a particular MIDI port. 
 
 
 
 
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