Planet Earth Rock and Roll Orchestra

(the "PERRO Chorus

• David Crosby – guitar, vocals
• Graham Nash – guitar, vocals
• Paul Kantner – guitar, banjo, vocals
• Grace Slick – piano, vocals
• Jorma Kaukonen – lead guitar
• Jack Casady – bass
• Jerry Garcia – guitar, vocals
• Phil Lesh – bass
• Bill Kreutzmann – drums
• Mickey Hart – percussion
• David Freiberg – viola, vocals

http://en.wikipedia.org/wiki/Planet_Earth_Rock_and_Roll_Orchestra