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						 Special audio effects, like "surround sound", 3DFX, Dolby, and others mix
						the output from the left and right stereo channels. 
						 
						 
						 
						It amounts to a deliberate "crossover" which is otherwise a form of distortion. 
						 
						All of these options should be turned off. 
						 
						 
						Follow the animated illustration to show the 'ADVANCED' button that controls special effects.
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