Vocal score for Differences In Demolition , A Sevdah Opera by Nigel Osborne. For soprano or high mezzo, mezzo soprano, tenor and 2 baritones, with orchestra of clarinet in Bb (doubling clar in Eb & bass clar in Bb), percussion, accordion, machines 1 & 2, violin, viola, cello. World premiere: Opera Circus, dir. Lenka Udovicki, produced by Tina Ellen-Lee, 9th June 2007, National Theatre, Mostar, Bosnia & Herzegovina.