Matthew Embree is an American singer and guitarist best known as the frontman of Rx Bandits. He also plays guitar and provides occasional vocals for The Sound of Animals Fighting, in which he is known as "The Walrus". He produced their album The Ocean and the Sun. Since 2016, Embree has been a touring member of Dispatch. Embree has contributed to several other hip hop, alternative, art, progressive, and psychedelic rock bands including Seekret Socyetee, Coke vs. Bills, Pebaluna, and Biceratops, among others.