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You can add a "sink" with the following.pacmd load-module module-null-sink sink_name=MySink
pacmd update-sink-proplist MySink device.description=MySink
You can add a loopback device with the command
pacmd load-module module-loopback sink=MySink"pacmd help" will tell you more about this Pulseaudio configuration utility. I'm going to need to learn it also, if I decide to decode with DREAM.Ron - KA7U
pacmd load-module module-loopback sink=MySink