There are at least three artists that go by the name of Zas:

Zas (lowercase) - Mostly known for orchestral arrangements of Zelda songs, and other video game music (see Prelude, Lucca's Arrival)

ZAS - A popular Lithuanian band ŽAS (Žertva Ant Smūgio)

ZAS - An Argentine band of the '80s, led by Miguel Mateos. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.