Please configure the PulseAudio package on Sid to use version "7:4.4-5" of libavutil56, opposed to version "7:4.3.2-0+deb11u2".
Currently, anyone who pushes the latest Sid dist-upgrade (at the time this email was sent) will have PulseAudio uninstalled by the package manager (apt-get).
Attempting to reinstall PulseAudio through the package manager will just result in this error prompt:
The following packages have unmet dependencies:
libavresample4 : Depends: libavutil56 (= 7:4.3.2-0+deb11u2) but 7:4.4-5 is to be installed
E: Unable to correct problems, you have held broken packages.