Recently, I've added the repositories for Debian 'Stretch' to my Xubuntu Linux and it's broken some packages. I'm leading with this because, yes, I know that this is likely to break stuff, and if there is a solution to this problem then it may be related to this. I can handle package dependencies for the most part, but I thought that if there is a solution then it may be related to this (also, any resources thoroughly explaining package dependencies would also be appreciated). I have also uninstalled 'Pulseaudio' since I really don't like and don't need it.
I booted up my computer about mid-day today so that I could put on some (death metal warning) music while I studied for an upcoming test. The sound was louder than pretty much anything I've heard before, and this (thankfully) lasted a split second. It was so loud that it sounded like my ear buds were being eaten by a paper shredder when I held them in front of me.
I tried to see whether or not this was a problem with alsamixer's settings, so I tried setting the volume to the lowest that it would go while still being audible and seeing how loud it would be (being cautious about where my ear buds were in relation to my ears). When the volume is set to the quietest that I can set it to, it is still quite loud, though much more bearable at this point. Anything lower and it doesn't make sound at all. Here's a screenshot of what I've set it to now, and here's a screenshot of what I'd usually set it to.
I would like to restore ALSA so that it uses the original configuration, or, hopefully, something even more manageable. I would strongly prefer not to re-install 'Pulseaudio' for reasons stated above. I've tried restarting my computer, but the issue is still there. I'm really tired with Linux's sound systems and just want something to work without an issue for once in the ~5 years I've been using it.
P.S.: I'm not putting this in the 'Ubuntu' Stackexchange since I have a feeling that it's a platform-independent issue, especially considering that I don't have a specific platform anymore.