Preston Lea "Trey" Spruance III (born August 14, 1969) is an American composer, producer, and musician who co-founded the experimental rock band Mr. Bungle. He is also leader of the multi-genre outfit Secret Chiefs 3. Originally a guitarist and trumpeter, Spruance later began playing vintage electronic organs, saz, santur, electric sitar, tar, pipa, and various other string and percussion instruments.
Spruance's playing and composition style is influenced by many diverse genres of music, such as surf rock, Anatolian folk, death metal, film music, Afghan rebab music, ska, funk, space rock, jazz and Japanoise. Musique concrète and foley work also play a large role in his recordings.