Dear Maintainer,

the current version of pipewire in trixie does not allow setting the
volume of loopback nodes before audio is played over them.

This issue has been fixed upstream in commit b46a2b3d [0]. I have
verified that the attached patch with the change from that commit fixes
the issue. Could you consider backporting this fix to trixie?

Alternatively, it would be nice to have version 1.4.10 in
trixie-backports as this is the version, the bug was fixed upstream.

Regards
René Richter

[0]:
https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/b46a2b3d9507955f13d7113409307717f07dea9a