Freddie Mercury: Lead vocals, background vocals, piano, harpsichord.
Brian May: Guitars, bells on "The March of the Black Queen", lead vocals on "Some Day One Day", background vocals, some piano on "Father to Son."
Roger Taylor: Drums, gong, marimba, background vocals, lead vocals on "Loser in the End."
John Deacon: Bass guitar, acoustic guitar.
Roy Thomas Baker: Castanets on "The Fairy Feller's Master-Stroke."
Robin Cable: Piano effects (with Freddie Mercury) on "Nevermore."
And nobody played synthesizer... again
All songs produced by Queen and Roy Thomas Baker excluding:
"Nevermore" and "Funny How Love Is": Robin Cable and Queen.
"The March of the Black Queen": Roy Thomas Baker, Robin Cable, and Queen.
Ludwig Superclassic drum kit: 13" x 9" rack tom, two floor toms (16"x 16" & 18"x 16") and 26" x 14" bass drum. Ludwig and New Era tambourines and cowbells
Paiste Symphonic Gong
Musser Marimba and Bells
Fender Precision Pre-CBS Electric Bass, Orange OR120 amplifier
Martin D-18 Dreadnought Acoustic Guitar ("Funny How Love Is")
Hairfred Acoustic Guitar ("White Queen")
Ovation Pacemaker 12-String Acoustic Guitars (elsewhere)
Red Special Electric Guitar, using John Deacon's homemade bespoke amplifier (for guitar choirs and effects) and Vox AC30 Amplifiers (for solos and straight rhythm parts)
Bechstein D Concert 9'2" Acoustic Grand Piano, recorded via Neumann U87 mics
Harpsichord (unknown brand)