"David Hendry" wrote in news:firstname.lastname@example.org. com.au:
It sounds like you are looking for something like a Mr. Microphone for your computer. (It broadcast an FM signal a short distance that you could pick up on any dead air channel on a radio.) I have never heard of anything like this, but I have never looked specifically for it.
However, there are many things that would accomplish what you are looking for. I have installed a few different ones for clients. The nomenclature for them now seems to be "Wireless Media Centers." I have used the ones made by D-Link and Linksys. They both worked well. Roku also makes one that is good, but the ones I have installed have been audio only.
Also, if you are looking to play songs that you bought specifically from iTunes, the Apple AirPort Express is your only option due to the proprietary format that iTunes uses for their secure music.