Broadcast transmissions? (Score 1)

From the FAQ:

Do I need :CRQ software installed on my computer for my :CueCat to work?

Yes. The :CueCat device and :CRQ software work hand-in-hand. You must install the :CRQ software for your :CueCat device to work. :CRQ software reads Cues that are placed in any broadcast or other medium with audio. By having both a :CueCat device and the :CRQ software and connector cord installed, you can receive web pages both from print and broadcast. :CRQ software acts as a media manager that stores, sorts, filters, and presents all the Cues sent to your computer by broadcast and print Cues.

What kind of technology is this? I don't recall hearing anything recently about embedding URL's in audio.