I’m no audio guru, but I wonder if JACK might be employed to help here…
https://jackaudio.org/faq/pulseaudio_and_jack.html
https://forums.opensuse.org/showthread.php/522377-Pulseaudio-with-Jack-server
https://forum.manjaro.org/t/how-to-replace-pulseaudio-with-jack-jack-and-pulseaudio-together-as-friend/2086