Dear Frederick, dear Jerome,
Thank you for the valuable input. It contained the right buzz words to
enable me to find the solution in the internet [see 1].
Indeed, pulsaudio provides a usable sink and is already running. I did not
install/modify anything in my system.
with the command:
pacmd list-sources | grep name
I get my device name to use:
alsa_output.pci-0000_00_03.0.hdmi-stereo.monitor
This is used by a streaming software, for now I followed Dimitry's example
and used VLC:
cvlc -vvv pulse://alsa_output.pci-0000_00_03.0.hdmi-stereo.monitor --sout
'#transcode{acodec=mpga,ab=128,channels=2}:standard{access=http,dst=localhost:8005/spotify.mp3}'
My MPD plays back the stream from http://localhost:8005/spotify.mp3
On my setup I experience a delay of ~2seconds between an action at spotify
app and heard speaker output. This is OK for me, because all four zone
outputs are in perfect sync and will be like this.
CU
Jürgen
[1] https://sandalov.org/blog/1441/
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