Specific Sound/polyphia Options

[enlo22]

hey guys, I stumbled upon this band and i've noticed there's a perticular sound these guys have that idk how to describe, i've found a few other guitarist using this sound, idk if it's perticular modes or scales or chords... but i've enjoyed it because it doesn't sound as usual as most metal does. I'm completely clueless as to what they're doing in theory but are they using 7th chords? is that how they get that sound? for example in the solo in the intro the fast part at 22 seconds, i've heard that a lot but have no idea what's going on there lol. i'm mostly asking becasue i want to expand my knowledge and maybe create this kind of sound in certain parts of songs but i have not a clue or direction lol

https://www.youtube.com/watch?v=0jhZB73IawI

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