This was a requirement we decided to tackle last year. At CEDIA 2014 we launched a new Just Add Power Transmitter called the 2G+AVPro. This device has a Dolby DSP on board, allowing us to send out multi-channel and stereo audio simultaneously to all zones. The AVR zones get 5.1 audio, the stereo TV zones get 2.0 audio. [Link: justaddpower.com]