The Extron SW 8SV and SW 8SVA are high performance S-video switchers. The SW 8SVA also includes stereo audio. These switchers feature a genlock input and vertical interval switching, providing synchronization of video signals of one device with those from another video source and resulting in smooth and clean transitions when switching between inputs. The model with audio includes adjustable gain and attenuation, allowing users to set the individual input audio levels, providing no significant difference in volume when switching between sources. All SW SV eight and 12-input switchers offer multiple forms of control, including front panel buttons, RS-232, auto-input switching, or an optional IR 102 universal remote.