Are you really recommending buying a receiver just to use as an adaptor for your existing audio gear?
It's great if you've already got one but I think he was suggesting a small and inexpensive plug in adaptor.
No, I'm not suggesting anything, just looking for clarification on what the OP was saying and using my receiver as an example of a two-way AirPlay conduit. That said, if you have other a/v components, you need a receiver anyway. Might as well get one with AirPlay so you can extend audio to remote locations in the house. I stream all over the house and use the Remote app to select what's playing. It's great. Also, basic 5.1 A/V receivers are really inexpensive these days. It's more a matter of space than $.
TV? Guess what it can do too? And it has Siri voice controls, AM music, etc baked in as well... PLUS all of the video benefits... PLUS full home sharing... PLUS the flexibility of third party apps so one could opt to play Pandora, Tidal, etc without having to lean on Airplay. Since one must have an iDevice to set up an HP, the few parts of HP not already baked into