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xdemorse

Live Morse decoder with a GTK waterfall, from a sound card

What it does

Listens on a sound card, shows a narrow spectrum display so you can see which tone you are decoding, and prints the Morse it hears as text. It tracks sending speed automatically within a range you set.

Why you would want it

It is the small, focused live decoder: a window with a waterfall and a text pane, no logging, no modem, no configuration ceremony. When the question is just "what is that signal saying", fldigi is a lot of program to start.

Before it will work

Receiver audio reaching a sound-card input — a physical cable, or a loopback device if the receiver is itself software. Set the audio device inside the program, not by hoping the default is right.

How it installs

  • apt: xdemorse

Known problems

Hand-sent Morse with irregular weighting defeats it, as it defeats every automatic decoder; the operator's ear remains better and this is worth knowing before blaming the software. It decodes one tone at a time, so a crowded band needs the receiver's filter narrowed rather than the program adjusted.

Keeping it current

  • probe: apt policy
  • strategy: apt_upgrade

Where to get help with the software itself

Neoklis Kyriazis, 5B4AZ. The project page carries the source and a change log; there is no issue tracker.

Source: catalog/packages/xdemorse.yaml