Sound and Music and Art Assembly  are offering an opportunity to composers or ensembles to perform a support slot at a concert within the William Basinski's Arcadia series. So far, concerts, which will be held at St John-at-Hackney, include Michael Gira (12 March) and a collaboration between Charlemagne Palestine and Rhys Chatham (20 March), both events of which will include performances by William Basinski himself.