If there was a Nostradamus of the digital music era, it might well have been Kane Kramer, a British inventor and businessman. Thirty years ago he filed patents for his digital audio player, called the "IXI." The device resembled one of those old hand-held electronic football games and held a whopping 3 minutes and 50 seconds worth of audio (roughly three Ramones songs or 1/10th of the live version of "Freebird").