The phrase "a regular composer" is correct and usable in written English.
It can be used to describe someone who composes music on a consistent or routine basis, often implying a level of professionalism or habit.
Example: "He is a regular composer, producing new pieces every month for various ensembles."
Alternatives: "a frequent composer" or "a consistent composer."
Christophe Beck, a regular composer for the series, filled in the overture and coda and composed "Dawn's Ballet".
He was the only composer for this game, and has been a regular composer in the Kirby series.
Donaggio became a regular composer for Brian De Palma films and credits Nicolas Roeg with giving him his first lesson in writing film scores, and expressed a desire to work with him again.
Unusually for a film noir, the music by the Coens' regular composer Carter Burwell features Beethoven sonatas and a plangent solo piano on the soundtrack, presumably as a homage to James Cain, in whose life and work classical music played an important role.
Music was provided by Dudley Simpson who, at this time, was the regular composer on Doctor Who. Simpson composed the main title theme that accompanied the opening and closing credits as well as approximately 60 minutes of incidental music.
In keeping with the Amadeus parody, the music of Wolfgang Amadeus Mozart (a favorite of Jeff Richmond, the show's regular composer) is used to score much of the episode.
That decision was made with the help of Carter Burwell, the Coens' regular composer, who has also been part of their stable since "Blood Simple".
He has had no musical training, he said (although his companion is the singer Fiona Apple), but he does call in his regular composer, Jon Brion, during the planning stages.
Nolan's regular composer Hans Zimmer has the measure of the madness, cooking up an eerie score that swerves from the creaky Goblin-esque horrors of mid-period Dario Argento to the imposing hallelujahs of what sounds like a massive church organ.
Following Radiohead guitarist (and Anderson's regular composer) Jonny Greenwood as he journeys to India to record in collaboration with Israeli muso Shye Ben Tzur and brassy qawwali troupe the Rajasthan Express, it's a making-of project that pleasingly avoids any worthy statements of intent, focusing on the thrilling playing itself.
From his debut project till Thalapathi, Ilaiyaraaja was Ratnam's regular composer.
