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So what do you do to digitally record hours of AM or shortwave radio? The Professor recently took up that very question. One solution one might consider is connecting your computer’s audio input to a radio. The big problem there, however, is that computers generate a ton of RF interference which can seriously mess up AM and shortwave reception. iPods and other MP3 devices wreak similar radio havoc. via Recording Radio for Fun, Games and Posterity - http://www.radiosurvivor.com/2009/09/19/recording-radio-for-fun-games-and-posterity/