Hi scooter - if you have the TV speakers and Optical on at the same time, this may result in an echo. You may want to connect via HDMI instead. If you would like to switch between sources, Samsung TV's have Anynet+ (also known as HDMI-CEC), a feature that allows connected external HDMI devices to inform your TV when they have turned on. By default, the TV will immediately switch to this source when this happens. ^Val