Battles Within and Without

Featuring madrigals by Renaissance composer Monteverdi and Missa del Cid by Judith Weir, performed by ten actor musicians and combining vocal performance, original staging and film.

The Mask Behind the Face

An emcee, singer and pianist perform a newly devised script bringing together cabaret songs by Schoenberg, Poulenc, Weill and Britten.

Into the Woods by Stephen Sondheim

An actor musician production featuring performers from the Royal Northern College of Music in Manchester.

The Wedding by Stravinsky - SOAP (Salford Opera Action Performance)

A new staging devised in collaboration with volunteers from Salford and performed at Contact Theatre, Manchester.

After Party

A new play with music by Katharine Armitage featuring lieder by Franz Schubert.

Thousand Furs

A new opera for six singer-instrumentalists with words by Katharine Armitage and music by Michael Betteridge.


A new play about the tumultuous relationship between Robert and Clara Schumann, with words by Katharine Armitage and music by Robert Schumann.


William Petter – Musical Director

Concordia Voices

William is a freelance musical director, tenor and singing teacher based in London. He began his musical life as a chorister at New College, Oxford, under the direction of Edward Higginbottom. Whilst studying for a degree in Neuroscience at University College, London, he started singing as a tenor, and went on to study as a postgraduate at the Royal Academy of Music, for which he gained the highest award, distinction with DipRAM.

For Re:Sound William has worked as Musical Director for Thousand Furs and Battles Within and Without. He has been musical director of Concordia Voices since 2011, and also directs the professional choir of St Magnus the Martyr, with whom he has produced two commercial CDs, and the chamber choir Sine Nomine Singers. Works conducted include Bach’s Easter Oratorio, Brahms Requiem, Durufle Requiem, Handel Messiah, Stainer Crucifixion, Mendelssohn Elijah, as well as Mozart Requiem, Solemn Vespers K339 and Piano Concerto no 23.

He sings as a tenor soloist with many ensembles and societies across the UK. In 2015 he gave the premiere of a new song cycle The Light Walking by Paul Ayres, and a solo recital in the London Festival of Contemporary Church music. He also enjoys consort work, working with groups including The Sixteen, the Choir of the Enlightenment,  Philharmonia Voices, Britten Sinfonia Voices, London Voices, Westminster Abbey Choir, Westminster Cathedral Choir and other London church choirs.