Final answer:
The session musicians known as The Wrecking Crew played on many records from Los Angeles and were pivotal in the 1960s and 1970s music scene.
Step-by-step explanation:
The informal name of the session musicians who played on many records coming out of Los Angeles is The Wrecking Crew.
These musicians were highly sought after during the 1960s and 1970s and contributed to the success of numerous hits in various genres, working with artists such as The Beach Boys, Frank Sinatra, and The Monkees.
Originating from an era where rock 'n' roll was blossoming and rhythm and blues were pivotal in the music scene, they played an essential role in the development and production of songs in many Los Angeles studios, crafting the soundtrack of a generation.