I recently bought a Sonos amp and have no problem using Apple Airplay from my Mac and iPhone. I also have the amp connected to a CD player.
I was told I can connect an external hard drive through the ethernet port but there is no information on the Sonos website on how to do this. I put all my MP3s and MP4s on a Sandisk solid state hard drive and and hoped to play them directly from this.
Anyone figured out how to do this? Sorry, but only proficient in Mac operating systems.