Congratulations Ron, can I ask a favour, feel free to say no but I don't know enough to help myself with this.
As mentioned my Pi4 is polling my LAN every second, the polled addresses include
224.0.0.251
all-systems.mcast.net
all local IP addresses on my LAN
Checking them out it appears as though there's a DLNA package installed and active as mentioned before and I can't figure out what it is and it's still doing it of course.
When I noticed the LAN traffic and tracked it down to the Pi, I then installed iftop and then $ sudo iftop -i wlan0 to see what was happening (it's on WiFI obviously) and that's where the polled info above was seen.
I'd really love someone who's installed a fresh Buster Raspian and the packages you have which seem to be more or less what I've done, to see if you've got the same situation.
Regards,
Phil
Edit: iftop command set, while iftop is running, press keys as below
S - display source port
D - display destination port
n - show IP instead of host name
1/2/3 - sort by the specified column
< - sort by source name
> - sort by destination name
P - pause display ( else it will be often updated to show the current status )
j/k - scroll display
? - for help
PS. I don't know enough to help you with your audio but presume you've checked out the Pothos remote wiki, and I guess Tech Support would have commented if it had been relevant, ie.
The remote format key specifies the stream format that should be used on the remote device. The default behaviour uses the device's native format over the link when the conversion to the local format is supported. Otherwise the remote and local endpoints use the same data format.
However, users can manually override the remote format setting: Specify {"remote:format":"CS16"} to use complex 16-bit integers over the link, or specify {"remote:format":"CS8"} to use complex 8-bit integers over the link; and the remote stream driver will perform the conversion to/from floating point.
