You have CD/MP3/TV if you have the Dietz installed. In TV mode with the Dietz installed you have only one audio/video source, anything else would be selected on and controlled by the device you have connected to the Dietz. For example if you connect an iPod to the audio in of an external DVD player you would need to select the audio port on the DVD payer and not on the RNS-E. On the other hand, if you get an IceLink or similar you can select CD changer or TV on the RNS-E and switch between the two devices.