[BC] Arbitron

[Craig Healy]

> FWIW, I took Warren's idea of 'mix-minusing' around a
> PPM encoder and came up with this:
> http://www.w3am.com/PPMonly.mp3
> It's not a perfect null but good enough to hear what's
> happening.
>
> And here's what an FFT analysis of the above PPM-only shows:
> http://www.w3am.com/PPM_FFT.bmp
> Apparently centered around 2KHz, plus or minus 1KHz.
>
> Sounds like we should have great TSL with the Cylon
> community.

Would be interesting to be able to build a decoder and leave it on some
evening on a non-local frequency.  See what shows up, assuming an ID can be
decoded and saved to a text file.

Craig Healy
Providence, RI