Crack the code?

[JonF]

I sure seem to recall a Cecil column on this, so I'm posting this here. Maybe it's a Weird Earl instead ...

(The search engine came up with zero hits for the word "radio" ... ya gotta be kidding!)

Remember those radio stations that just broadcast numbers? Now you can get a large number of them on CD at The CONET Project.

There's a challenge too ... The Numbers Station Crack Challenge Home Page.