Collaborations are a rarity in classical composition: most pieces are written by a single person.
Not so Trees, Walls, Cities, a cycle of new songs by eight composers with interlocking musical material by Nigel Osborne.
Scored for soprano and string quartet, the piece is unified by themes of conflict and resolution, as it travels to the diverse locations of Derry-Londonderry, Vienna and Nicosia.
Inevitably the songs differ stylistically, but there are strong images of deracination, loss and rebirth and the soaring vocalism of soprano Lore Lixenberg is a binding element.
For the Elgar Piano Quintet the Brodskys were joined by Derry-born pianist Cathal Breslin, who has done an outstanding job curating this year's Walled City Music Festival.
A night of chamber music of the highest quality.