Peter and Kathryn Walls commissioned the prolific New Zealand composer Ross Harris to write 'Three Orchestras Pieces' for the NZSO's 2010 European tour.
The orchestra was going to visit the Swiss city of Lucerne in which Wagner lived for a time, and this inspired the second of the set of Harris's music.
Opus's performance reflected convincingly the richness of that picturesque lakeside city, rather than that found in the usual Wagnerian music.
Schubert's 'Unfinished Symphony' is so-called because it has only two completed movements, and is noted for an extraordinary power which appeals to audiences.
Besides having sweet melodies so typical of Schubert, a radical feature is the sudden jumps between serene and harsh music.
Opus caught these moods impressively when the string, woodwind and brass sections wove these strands together to get sensuously quiet and theatrically dark passages.
Peter Walls effectively 'f'inished' the Unfinished Symphony by following it with the last movement of the Haffner Symphony, a Presto, in order to contrast the styles of Mozart and Schubert.
Hanno Fairburn