One thing I found very annoying when switching from Ubuntu to Debian (and latter Tanglu) was that, whenever a new application starts playing audio, the volume jumps to 100%. The volume of every soundcard was always at least the volume of the loudest application playing.
At some point I decided to look for solutions and found that Ubuntu ships a non-default PulseAudio configuration file that sets flat-volumes = no in /etc/pulse/daemon.conf. This setting is (surprise, surprise) undocumented but what it does is very convenient: It detaches application volumes from the global soundcard output volume. So if an application is playing audio with 100% volume the soundcard's volume will not also become 100%, but stay at its (usually a lot lower) previous volume.(Eardrums saved! 🙌)
Please also introduce this fix into Tanglu!