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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, including Quincy Jones, Michael Bublé, and the Metropole Orkest.

Callum Au

Selected Work Portfolio

Over the past ten years, Callum has established himself as one of the busiest arrangers and orchestrators in the country. He has worked alongside many of the world’s top commercial artists as a composer and arranger. He is at home writing anything from new compositions for contemporary big band to large scale arrangements for full orchestra.

An album full of sheer joy

 – full of invention, talent, virtuosity, passion and an overwhelming feeling that a large collective of musicians were all in absolute unison and enjoying every minute of it… as indeed every listener should, as well.

Parliamentary Jazz Awards
‘Album of the Year’ 2021

available on Vinyl, CD and digital

Callum Au & Claire Martin 'Songs And Stories'

Au clearly possesses his own 24-carat storytelling gift”

Peter Quinn

Jazzwise Magazine

Ultimate Big Band Toolkit

The Musician’s Guide to the Big Band by Louis Dowdeswell & Callum Au

available for Trumpet, Trombone, Saxophone, Drums, Bass, Guitar and Piano – contains PDF eBook with Short Guide, world-class tutor instructions, audio and a bonus album ‘On Stage!’

As well as being in demand as a writer, Callum has been a member of the Ronnie Scott’s Jazz Orchestra since 2012 as a trombonist.

He has worked with most of the top big bands and jazz ensembles in the UK, for multiple West End musicals, at the BBC Proms, and as a session musician on many recordings for film and TV.

Callum Au