Spencer Seim (born January 28, 1981) is an American musician, best known as the guitarist in the band Hella. He is also the drummer in the Nintendo music cover band called The Advantage and has a solo project named sBACH. The sticker on the cover of the self-titled release says "a thousand times better than Hella or The Advantage".
Spencer Seim plays the drums and plays guitar on the record that he released for his solo project .  
He's the guitarist of Hella and the drummer for The Advantage but that doesn't guarantee that he fulfilled both of those roles when recording sBach. 