Any & all playback is overly loud until I manually adjust volume on my keyboard... What the Hell is going on?

So for the past few weeks, any time I start a video, an ad plays music in a new tab, or I do, well, anything that plays volume, it starts at a consistent but overly loud setting.
Changing the volume on my headset does nothing to solve the problem. I can change it, sure, but it’s still too loud. The only way the volume actually goes down to the relative level I want is by engaging the volume wheel on my Corsair Keyboard. The slightest manipulation, and the volume seems to jump down by “10 points” according to Windows 10.

Anyone know what this fucing frustrating shit could be??