He remained dedicated to music, however, and studied at the Carnegie Institute and majored in music at the University of Pennsylvania. In 1964, a year after graduating, he was signed to MGM Records as a recording artist, releasing "Come to the Sunshine," which had some local chart action in Phoenix, AZ, and threatened to do something nationally without succeeding. (It did promise enough to require that Parks put together a band to back him on-stage, whose members included a young Stephen Stills.) He became a session musician and worked with Sonny & Cher (when they were "Anthony & Cleopatra"), as well as playing sessions for producer Terry Melcher on records by Paul Revere & the Raiders and other artists. On the Byrds' Fifth Dimension album he played the Hammond B-3 organ, and he also played keyboards on sessions for Judy Collins, and arranged songs for Tim Buckley.

It was also Melcher who got Parks together in 1966 with Brian Wilson of the Beach Boys. A prodigiously gifted composer, Wilson was no lyricist, and he needed one who could match the daring new music he was devising in his head -- this resulted in their collaboration on the SMiLE album. Initially, only "Heroes and Villains" emerged from their work together as a modest hit single but a well-loved one, and the project languished over Wilson's worsening emotional and mental state in 1967. Fragments and pieces of the project turned up on ensuing albums into the early '70s, and Parks also played a key role in completing a song, "Sail on Sailor," that gave the Beach Boys a rare early-'70s single success. (In an early-'80s interview, incidentally, Parks said -- without blame or recriminations -- that he had never received a penny in royalties from his work with Wilson or the sales of the Beach Boys' records, a situation that was no doubt tied to the confusion surrounding the sale and ownership of their publishing, which was later nullified.)

In 1967, as work on SMiLE came to a halt, Parks was lured to the newly invigorated Warner Bros. label by producer/A&R chief Lenny Waronker. His new professional berth led to a single, "Donovan's Colours," credited to "George Washington Brown," and its response -- especially a pioneering piece of pop/rock criticism by journalist Richard Goldstein -- helped redefine "rock" as distinct from rock & roll. Parks and Waronker were responsible for transforming the Tikis into the pop/rock novelty act Harpers Bizarre, which became a new success for the label. Out of their work together, and all of these other projects -- and the creative stew that Waronker had set boiling at Warner Bros. and its new sister label, Reprise -- grew Parks' Song Cycle, a debut album that was the very definition of the word "eclectic," incorporating folk, classical, Broadway, ragtime, jazz, '50s pop, and rock & roll influences. It won the Record of the Year Award from High Fidelity/Stereo Review, and although it never sold in big numbers, the LP stayed in print for nearly two decades.

He then did session work with a variety of artists, not releasing his second album, Discover America, which revealed his immersion in Trinidadian music, until 1972. Clang of the Yankee Reaper, another eclectic collection, followed in 1976. But Parks maintained his "day job" -- film work on scores by Ry Cooder and others, writing and arranging for Shelley Duvall's children's TV series, and other pursuits. Finally, in 1984 came the brilliant Jump!, a concept album (and proposed stage musical) based on the Uncle Remus tales of Joel Chandler Harris. It was followed in 1989 by Tokyo Rose, which concerned the state of American-Japanese relations. In 1998, he released a live album, and in the next decade he collaborated anew with Brian Wilson, who finally released a finished realization of SMiLE with new recordings on the Nonesuch label in 2004. (By that time, however, dozens of unauthorized bootleg editions of tracks from the 1967 sessions had surfaced, to the delight of fans.) Two years later, Parks began contributing lyrics to another Brian Wilson project, That Lucky Old Sun, as well as lending his arrangements to Silverchair's Young Modern (his second collaboration with the Australian band) and Inara George's An Invitation.