🚀 go-pugleaf

In article <25740@cup.portal.com>, mmm@cup.portal.com (Mark Robert Thorson) writes:
> I seem to recall that Muzak is transmitted in the FM band using some kind
> of funny encoding.  Can someone describe how this works, and what would
> be needed to build a transmitter to break into these broadcasts (purely
> for informational purposes, of course).

These signals are FM subcarriers above 53 Khz, added in with the baseband audio,
and the other stuff that makes up a FM stereo signal.  All of this frequency 
modulates the main carrier. It's all in a package, so you can't override one 
part with out mucking up the rest.

A good way to listen to this stuff is to hook up a VLF receiver to the output 
of the detector of an FM tuner.  Interesting what you find, but the 
@#$%^& Electronic Communications and Privacy Act says you shouldn't.  Most
of elevator music is by subscription and money talks.

markz@ssc.uucp