Had an annoying issue regarding sound. Using OpenSUSE Tumbleweed with KDE (although this *SHOULD* work on pretty much any distro with KDE). There was a software-equalizer, LADSPA, that kept showing up, and no matter what I did, it would ALWAYS set itself to be the default sound device, making everything sound muddled/over-amped.

I believe it was due to the installation of the ladspa-swh-plugins and pulseaudio-equalizer packages. I removed both of those packages, and also deleted all the files from the $HOME/.config/pulse directory, but left the "presets" directory in place. Strongly suggest making a backup copy of those files first, in case something goes wrong.

A quick reboot, and I magically have one sound device that works, with nothing to select over and over again.