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I was told you can use a computer to decode am shortwave digital signals just by plugging into the shortwave reciever earphone jack to the computer's soundcard line-in jack for CW SSB weather maps & info, Ship to shore, RTTY & other digital broadcasts. I tried to do this it don't work. Do I need a special program to make it work? I need info on how to do this, since I have 2 shortwave conitnuous recievers without a darn BFO in them to so the same thing with a reciever on only SSB & CW tho.