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This 2017 photo released by Lucasfilm Ltd shows John Williams, a five-time Oscar-winning composer. Image Credit: AP

After more than six decades of making bicycles soar, sending panicked swimmers to the shore and other spellbinding close encounters, John Williams is putting the final notes on what may be his last film score.

“At the moment I’m working on ‘Indiana Jones 5,’ which Harrison Ford — who’s quite a bit younger than I am — I think has announced will be his last film,” Williams says. “So, I thought: If Harrison can do it, then perhaps I can, also.”

Ford, for the record, hasn’t said that publicly. And Williams, who turned 90 in February, isn’t absolutely certain he’s ready to, either.

“I don’t want to be seen as categorically eliminating any activity,” Williams says with a chuckle, speaking by phone from his home in Los Angeles. “I can’t play tennis, but I like to be able to believe that maybe one day I will.”

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Conductor John Williams conducting the orchestra in Boston in 1980. Image Credit: AP

Right now, though, there are other ways Williams wants to be spending his time. A ‘Star Wars’ film demands six months of work, which he notes, “at this point in life is a long commitment to me.” Instead, Williams is devoting himself to composing concert music, including a piano concerto he’s writing for Emanuel Ax.

This spring, Williams and cellist Yo-Yo Ma released the album ‘A Gathering of Friends,’ recorded with the New York Philharmonic, Pablo Sainz-Villegas and Jessica Zhou. It’s a radiant collection of cello concertos and new arrangements from the scores of ‘Schindler’s List,’ ‘Lincoln’ and ‘Munich,’ including the sublime ‘A Prayer for Peace.’

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Composer and conductor John Williams holds three Grammy Awards he won for best original score, best instrumental composition and best pop instrumental recording for his work on the film “Star Wars” in Los Angeles on Feb. 23, 1978. Image Credit: AP

Turning 90 — an event that the Kennedy Center and Tanglewood are celebrating this summer with birthday concerts — has caused Williams to reflect on his accomplishments, his remaining ambitions and what a lifetime of music has meant to him.

“It’s given me the ability to breathe, the ability to live and understand that there’s more to corporal life,” Williams says. “Without being religious, which I’m not especially, there is a spiritual life, an artistic life, a realm that’s above the mundanities of everyday realities. Music can raise one’s thinking to the level of poetry. We can reflect on how necessary music has been for humanity. I always like to speculate that music is older than language, that we were probably beating drums and blowing on reeds before we could speak. So it’s an essential part of our humanity.

“It’s given me my life.”

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John Williams, right, shakes hands with “Star Wars” character C-3PO at a news conference in Boston on April 30, 1980. Image Credit: AP

And, in turn, Williams has provided the soundtrack to the lives of countless others through more than 100 film scores, among them ‘Star Wars,’ ‘Jurassic Park,’ ‘Jaws,’ ‘Close Encounters of the Third Kind,’ ‘E.T.,’ ‘Indiana Jones,’ ‘Superman,’ ‘Schindler’s List’ and ‘Harry Potter.’

It’s an amount of accomplishment that’s hard to quantify. Five Oscars and 52 Academy Award nominations, a number bested only by Walt Disney, is one measurement. But even that hardly hints at the cultural power of his music. A billion people might be able to instantly hum Williams’ two-note ostinato from ‘Jaws’ or ‘The Imperial March’ from ‘Star Wars.’

“I’m told that the music is played all over the world. What could be more rewarding than that?” says Williams. “But I have to say it seems unreal. I can only see what’s in front of me at the piano right at this moment, and do my best with that.”

All those indelible, perfectly constructed themes, he believes, are the product less of divine inspiration than daily hard work. Williams does most of his work sitting for hours at a time at his Steinway, composing in pencil.

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Composer John Williams poses at the Academy of Motion Picture Arts and Sciences event “Behind the Score: The Art of the Film Composer” in Los Angeles on July 21, 2014. Image Credit: AP

“It’s like cutting a stone at your desk,” he says. “My younger colleagues are much faster than I am because they have electronic equipment and computers and synthesizers and so on.”

When Williams began (his first feature film score was 1958’s ‘Daddy-O’), the cinematic tradition of grand, orchestral scores was beginning to lose out to pop soundtracks. Now, many are gravitating toward synthesised music for film. Increasingly, Williams has the aura of a venerated old master who bridges distant eras of film and music.

“Recording with the New York Philharmonic, the whole orchestra to a person were awestruck by this gentleman at now 90 who hears everything, is unfailingly kind, gentle, polite. People just wanted to play for him,” says Ma. “They were floored by the musicianship of this man.”

This late chapter in Williams’ career is in some ways a chance to place his mammoth legacy not just in connection with cinema but among the classical legends. Williams, who led the Boston Pops from 1980 to 1993, has conducted the Berlin, Vienna and New York philharmonics, among others. In the world’s elite orchestras, Williams’ compositions have passed into canon.

Williams’ enduring partnership with Steven Spielberg has, of course, helped the composer’s odds. Spielberg, who first sought out a lunch with Williams in 1972 after being captivated by his score to ‘The Reivers,’ has called him “the single most significant contributor to my success as a filmmaker.”

“Without John Williams, bikes don’t really fly,” Spielberg said when the AFI honoured Williams in 2016.

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John Williams, left, and director Steven Spielberg pose together at the 2016 AFI Life Achievement Award Gala Tribute to John Williams in Los Angeles on June 9, 2016. Image Credit: AP

They remain irrevocably linked. Their offices on the Universal lot are just steps from one another. Along with ‘Indiana Jones,’ Williams recently scored Spielberg’s upcoming semi-autobiographical drama about growing up in Arizona, ‘The Fabelmans.’ The two movies make it 30 films together for Spielberg and Williams.

“It’s been 50 years now. Maybe we’re starting on the next 50,” says Williams with a laugh.

In Spielberg’s films and others, Williams has carved out enough perfectly condensed melodies to rival the Beatles. Spielberg once described his five-note ‘Communication Motif’ from ‘Close Encounters’ as “a doorbell.”

“Simple little themes that speak clearly and without obfuscation are very hard to find and very hard to do,” says Williams. “They really are the result of a lot of work. It’s almost like chiselling. Move one note, change a rhythmic emphasis or the direction of an interval and so on. A simple tune can be done in dozens of ways. If you find one that, it seems like you discovered something that wanted to be uncovered.”