ESS_OUTPUT_CLASS 1992 dev/isa/ess.c  		dip->mixer_class = ESS_OUTPUT_CLASS;
ESS_OUTPUT_CLASS 2002 dev/isa/ess.c  		dip->mixer_class = ESS_OUTPUT_CLASS;
ESS_OUTPUT_CLASS 2011 dev/isa/ess.c  	case ESS_OUTPUT_CLASS:
ESS_OUTPUT_CLASS 2012 dev/isa/ess.c  		dip->mixer_class = ESS_OUTPUT_CLASS;