Getting Data from Satellite

https://www.rtl-sdr.com/tag/wxtoimg/

mentions:
https://wxtoimgrestored.xyz/beta/

mentions a virtual audio cable, here is a search result:
https://www.onetransistor.eu/2017/10/virtual-audio-cable-in-linux-ubuntu.html

https://jackaudio.org/

(edit: see more: https://www.reddit.com/r/RTLSDR/comments/6d0rff/piping_audio_to_another_program_with_gqrx/ ) , https://qjackctl.sourceforge.io/qjackctl-index.html#Intro )

the guy on the wxtoimg page said he used vb-audio for his virtual audio cable.
https://www.vb-audio.com/

Added. Jack Audio is also here:
https://www.dxzone.com/catalog/Software/Linux/