I used an app on my phone to get a rough idea of the decibel level i listen at, and marked it on my amp’s knob, then stay at or below that safe level – plenty loud for me.
Something like this, as a reference, and 80db as my ‘max’ level marked on my amp.
Denuvo is always online DRM software, that usually results in performance issues (reduced frame rate, increased latency, stuttering, etc.).
In this case it appears Ubisoft avoided tried to skirt the potential bad press from performance issues by delaying the inclusion of denuvo until after people had bought the game/early reviews came out.
That’s a dip pen – you may notice it is missing a feed. They are pretty cheap to get into!