While probably not an ideal solution for the parent poster, who understandably wants to make things work with their existing Sonos gear, the A1392 is an outstanding value at this point because there are absolute truckloads of them on eBay for ~$20.
Assuming you're okay with AirPlay (which, admittedly, rules a lot of HN folks out) this is a $20-per-room device that gives you full lossless multiroom streaming including your choice of analog or optical out. Really great.
Assuming you're okay with AirPlay (which, admittedly, rules a lot of HN folks out) this is a $20-per-room device that gives you full lossless multiroom streaming including your choice of analog or optical out. Really great.