[kenhwang]

I've used a couple of single/dual/tri-band wireless transmitters to hook up speakers, and I'd say I'm not really a fan. You have to be ok with dropped packets from interference (which happens pretty frequently if you're also sharing your 2.4/5/6ghz spectrum with WiFi), which is audible as silence or wrong sounds.

Or you're using a protocol that does retransmission/buffering, which introduces noticeable latency with the video or even between speakers.

[amluto]

WiFi is not so good as a replacement for wires — the latency is too high. The main contenders seem to be Dirac and AVB, both of which run over Ethernet. Dirac uses entirely ordinary Ethernet, and AVB wants some fancy extensions, which will bump up the price of your switches quite a bit.

For good audio, you want known, controlled latency, preferably with quite precise timing. For live audio, or for a fully convenient replacement for analog cable, you want that known latency to be very short.

And you either need no drops or you need an entire drop + retransmit cycle to fit within your latency. (Hmm, FEC could be used, I suppose — encode packets such that an entire lost packet could be recovered from the preceding packets plus the next couple packets.)

[rjmunro]

In the professional world, Dante seems to be taking over as the Audio over Ethernet solution.

[WalterBright]

I stream TV and music over the intertoobs all the time. It works fine. The bandwidth on a home network is much higher, so it should be fine.