Posted November 20, 2015:
This page will detail some of my experiments with WebSDR, an HTML5 WebAudio-API enabled browser, and the FLDigi digital mode program. The signal flow for decoding digital modes is like this:
WebSDR (a remote website providing SDR) -> Browser-with-HTML5 including WebAudio API -> sound card and/or FLDigi or WSJTx digital mode decoder.
The signal flow for listening to standard analog modes is like this:
WebSDR (a remote website providing SDR) -> Browser-with-HTML5 including WebAudio API -> sound card -> Headphones.
You can plumb Pulseaudio to connect the browser’s output to FLDigi, as the latter will show up in the recording tab of the Pulseaudio control panel with the name “FLdigi : Capture …”
For unknown reasons, the Pulseaudio control app is almost never installed by operating system’s basic installation process. You need to install it, with something like:
apt-get install pavucontrol (This is for Debian or Devuan systems).
(To be continued)