Roy Thomas Baker

Born - November 10, 1946
Died - April 12, 2025

Producer, active from 1970's to 2025. Baker began career at Decca in England aged 14. Moved to Trident Studios. After co-founding Trident's record company Neptune, Baker began working with Queen whom he produced for five albums including the song "Bohemian Rhapsody".
Baker has produced and added his distinctive sound to artists such as The Cars, Ian Hunter, Nazareth, Guns N' Roses, The Who, The Rolling Stones, David Bowie, Foreigner, Journey, Ozzy Osbourne, Mötley Crüe, T.Rex, Devo, The Stranglers, Dusty Springfield, Yes, Cheap Trick, Gasolin', The Darkness and The Smashing Pumpkins.
Own studio: Roy Thomas Baker.

RTB in runout etchings does stand for Roy Thomas Baker, but it isn't currently interpreted as a credit on Discogs; it is a mark of quality assurance, indicating that Baker was present in the studio. (discussion)