Gtk-based psk31
  1 review

This is a psk31 transmission mode program using the sound card and optionally serial port to ptt the rig. it has nice functions and listen very well.
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limitingfactor 7 years ago

I've used this before in Kubuntu 12.04 and it's a good simple PSK31 receiver (I don't tx so can't comment on that). Didn't find audio device at first, see advice here: