Ernest James Watts is a Grammy-winning American jazz and R&B saxophonist who plays soprano, alto, and tenor saxophone. He has worked with Charlie Haden's Quartet West and toured with the Rolling Stones. On Frank Zappa's album The Grand Wazoo he played the "Mystery Horn", a straight-necked C melody saxophone. Watts also played the notable sax riff on "The One You Love" from Glenn Frey's album No Fun Aloud.

Charles Edward Haden was an American jazz double bass player, bandleader, composer and educator whose career spanned more than 50 years. Building on the work of predecessors such as Jimmy Blanton and Charles Mingus, Haden helped to revolutionize the harmonic concept of bass playing in jazz, evolving a style that sometimes complemented the soloist, and other times moved independently, liberating bassists from a strictly accompanying role, to allow more direct participation in group improvisation.