It’s not Debian but a distro based on Debian so that is the reason
why I can’t just use the template.
In case you are talking about Ubuntu or a Ubuntu-based distribution, see
qubes.3isec.org or build yourself using qubes builder.
In case of Debian-based use
Index of /r4.0/vm/ bullseye main
Index of /r4.1/vm/ bullseye main
So you are saying I need to add the Qubes repo in order to install
the pulseaudio-qubes package (among others) ?
Yes. I’d start of with pulseaudio-qubes and see what dependencies it
pulls in. Maybe that one alone will do the trick. However I suspect once
you added the repository and have audio going, you might want some of
the other qubes-core-agent- packages too… for C&P, USB proxy,
send/receive files from/to other qubes etc.
Basically, if your HVM is Debian based you can get all of the Qubes
functionality going this way.