Sonic Mobile for Trombone Choir (Sonic Mobile by Malcolm Forsyth is a 7 minute work written in 2003 for Trombone Choir in 4 parts with some divisi, so ideally one would wish to have at least 8 performers on the parts. There are no extreme ranges, so this work is suitable for intermediate level performers. There is some tenor clef. The work is slow & in beautiful lush chorale style.)