Common-mode 
																		noise is 
																		different 
																		than 
																		differential 
																		noise 
																		and is 
																		much 
																		more 
																		difficult 
																		to 
																		measure 
																		and 
																		eliminate. 
																		For the 
																		purest 
																		signal 
																		possible, 
																		Shunyata 
																		Research 
																		has 
																		developed 
																		a CMode 
																		filter 
																		that 
																		effectively 
																		reduces 
																		common-mode 
																		noise 
																		without 
																		introducing 
																		the 
																		sonic 
																		compression 
																		effects 
																		associated 
																		with 
																		conventional 
																		filters. 
																		It 
																		reduces 
																		high-frequency 
																		noise 
																		distortion 
																		while 
																		delivering 
																		an 
																		analog 
																		ease and 
																		palpable 
																		background 
																		silence 
																		that 
																		closes 
																		the gap 
																		between 
																		digital 
																		and 
																		analog 
																		systems.