Redirecting WebSDR audio to Fldigi input in Linux using the standard Pavucontrol volume control

November

2022

Redirecting WebSDR audio to Fldigi input in Linux using the standard Pavucontrol volume control

КВ, linux, firefox

22 November 2022 16:25

The method of redirecting the sound of the system to the input of the FLDIGI program for decoding signals with WebSDR.

I needed to get the sound from the headphones to the input of Fldigi. Internet search issued One page, where an understandable explanation is given. The standard program p is used to redirect the soundavucontrol.

Redirecting system sound (playback) to the input FLDIGI (recording) on the same computer, using pavucontrOl

1) Launched a web browser. In it, I used the Dutch WebSDR as a Sound source for Fldigi:
http://websdr.ewi.utwente.nl:8901/

Zvuk

2) Launch FLDIGI or another program that produces sound recording

3) Launch the utility "Start" - "Audio - Video" - "Pulseaudio volume control" (pavucontrOL).

If the volume control pavucontrol not found in the system, install and launch it:

sudo apt-get update
sudo apt-get install pavucontrol
pavucontrol

4) in the window "Volume" (pavucontrol) Go to the tab "Record".
Pavu1

5) in the list "From", choose item "Monitor of Built-in Audio Analog Stereo".
Pavu2

The “revive” signal level meter - it will show a changing signal level.

Close or roll the volume control.

6) Go to the FLDIGI program. It can be seen that sound is injected from an external source. In this case, websdr.
Output

Notice. In this case, such a setting is not a fraud, this is not a "cheat" (from the word "cheat" - to deceive). FLdigi program not connected to transmitter here and the hardware journal of radio communications is not conducted (the PC is at work). In other conditions, for example, competitions, the use of WebSDR is not welcome, because Radio amateur implies honest execution of generally accepted rules.

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