Scott Dorsey wrote:
Pooh Bear wrote:

Wireless transmission of high quality audio is bandwidth intensive. To date I'm
still unaware of anything capable of transmitting and receiving CD quality
audio. There are ppl working on it though in the same 'license free' band as
wireless networking etc....

Actually, a cheap trick we have used has been to take the inexpensive
transmitter/receiver pairs from the X-10 system which are intended for
passing video around the home, and running S-PDIF audio through them.

We have successfully shot S-PDIF from one building to the next in downtown
Baltimore just by pointing the things out the windows. Channel reliability
wasn't the best and I'd worry a lot about rain fade, but it worked better
than I'd expected and it allowed us to get good quality audio around.

There are Bluetooth audio headsets and stuff out there but they are strictly
low-fi. Normally using 64kbits/sec which after 'overheads' associated with RF
signal redundancy probably sound a bit like 32kbits/sec mp3.

There's no reason you can't get as much bandwidth as you want, as long
as you're willing to pay for it.
--scott

We're using a proprietary method, developed in-house, that gets very
close to 88.2kHz, 20-bit quality (with actually measureable 107dB s/n)
into the standard FCC FM mask requirements for bandwidth in the UHF
region. The audio is not companded, but instead we use a unique DSP
process to treat the audio before transmission. It is not identical to
a cable, but most users tend to say that it is the closest thing on the
market. And it's not terribly expensive anymore, since we are starting
to sell a lot of it, and have made some stripped-down products
recently. And unlike most network-based methods, ours only has latency
of 3.2mS.

/spam

Karl Winkler
Lectrosonics, Inc.
http://www.lectrosonics.com