Claim: Arcade Fire toured with instrumentalists.

William Pierce `` Will '' Butler -LRB- born October 6 , 1982 -RRB- is an American multi-instrumentalist and composer who is best known as a core member of the indie rock band Arcade Fire . Will plays synthesizer , bass , guitar and percussion . He is known for his spontaneity and antics during performances . He is the brother of Arcade Fire frontman Win Butler . Butler received his first Academy Award nomination for his work on the original score of the film Her in 2014 .