Callum Au is a British composer, arranger, orchestrator, and trombonist. He writes music across a wide range of genres, with a particular passion for big band and large jazz ensemble music. He is highly regarded for his stylistic awareness and versatility and has worked with world’s biggest artists.

Callum Au is a British composer, arranger, orchestrator, and trombonist. He writes music across a wide range of genres, with a particular passion for big band and large jazz ensemble music. He is highly regarded for his stylistic awareness and versatility and has worked with some of the world’s biggest artists.
Born in London to a Scottish mother and a Chinese father, Callum spent most of his formative years in Blackpool before moving to London, where he now lives and works.

Over the past fifteen years, Callum has established himself as one of the busiest arrangers and orchestrators in Europe. He has had the privilege of writing music for many international artists, including Quincy Jones, Jamie Cullum, Randy Brecker, and ensembles including the SWR Big Band, the Royal Philharmonic Orchestra and the Britten Sinfonia. In 2019, he was commissioned to arrange the big band songs in the Hollywood movie adaptation of Andrew Lloyd Webber’s ‘Cats’. More recently, he had the pleasure of writing two new arrangements for Michael Bublé’s album ‘Higher’, and conducting the BBC Concert Orchestra in a special episode of ‘Sunday Night Is Music Night’ for BBC Radio 2.

Callum is increasingly in demand as a composer for classical ensembles, with his flair for arresting melodies and lush complex harmony proving popular with audiences and musicians alike. Recent commissions include works for Inner City Brass at the Spitalfields and Ryedale Festivals and pieces recorded and performed by the Metropole Orkest and the Tippett Quartet.