By the mid-1960s Rothchild was established in the Los Angeles music scene, and his house on Lookout Mountain in Laurel Canyon was inhabited by many of the future musical superstars of the 1960s and 1970s. He produced the original song demo of Crosby, Stills, & Nash that landed the group a recording contract (it was actually Crosby, Stills and John Sebastian on the recording, with Sebastian later replaced by Graham Nash). Rothchild originated the concept "LEDO" ( Leadered / Equalized / Dolby / Original). This format insured the final tape would represent Rothchild's sonic vision for future generations.