Barely cutting through the din of radio white noise, a woman's voice hypnotically chants the numbers 1-6-8 between larger sets of numbers. She recites them slowly, clearly, with eerie detachment. In another transmission, probably from Sweden, a female voice intersperses her series of mysterious strings of digits with interludes from what sounds like a music box. Elsewhere, a Cuban man sings his series of seemingly random digits.

Taken together, these recordings possess almost a musical quality. It's collage art made from sound, what with the wide variety of white-noise textures, the almost ghostly delivery of the numbers, the fragments of music and other broadcasts, the minimal melodic patterns of the recitals, and the allure of their unknown origin.

"The Babbler," "The Bored Man," "Bulgarian Betty," "The Buzzer," "Cherry Picker," "The Counting Station--The CIA," "Cuban Atencion Stations," "Czech Drums & Trumpets," "Czech Lady," "DFC37 and DFD21," "Fife Free," "Four Note Rising Scale," "High Pitch Polytone," "KKN50," "The Lincolnshire Poacher," "Magnetic Fields," "MOSSAD--Israeli Intelligence," "Mystery Beeper," "New Star Broadcasting Station," "NNN Station," "Oblique," "Old Phonetic Alphabet Stations," "OLX," "The Rasper (LINK-11)," "Ready Ready," "The Russian Man," "The Skylark," "Single Letter High Frequency Markers," "Six Tone Station," "Strich," "Swedish Rhapsody," "Three Note Oddity," "Two Letter Phonetic," "Whales/Backwards Music," "The Woodpecker," and "Station YT."

A five-digit Spanish station on 6577 kHz has been traced to a site near Jinotega, Nicaragua. This station has been creating interference on this frequency which is allocated to air-to-ground communications for international airliners in the busy Caribbean sector. A five-digit Spanish station on 3927 kHz has been located approximately 15 miles SW of Havana near Guineo, Cuba. A five-digit CW station on 3690 kHz has also been traced to Guineo, Cuba. Another government source believes Guineo to be a major transmitter site used by DGI (Cuban Intelligence). Finally, there has been wide speculation that these transmissions are messages which are meant to be decoded using a 'one-time- pad' -- If that is the case, it's very curious to note that the same five digit groups are oftentimes seen to repeat over and again in the same crypt -- and that the very same transmissions are seen to repeat from week to week, and from month to month - so often, in fact, that tape breaks are sometimes noted! When spliced back together, the 'sloppy' handling sometimes results in truncated 5-digit groups - the end result being a mixture of 4 and 5-digit groups in the very same transmission! These facts would tend to point one away from the one-time-pad concept and support a couple of other theories - suggesting that the numbers are NOT a cipher, but rather a code unto themselves, and that much of this traffic is 'dummy' in nature - broadcast simply to keep a frequency open over a long period of time. In addition, most five-digit Spanish numbers transmissions are very badly over-modulated, resulting in numerous spurs up and down frequency. When broadcast under such conditions, the numbers (6) seis and (7) siete are almost indistinguishable, making it impossible to copy a crypt without numerous errors.

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