Boston Musica Viva and its director, Richard Pittman, are spending this season packing for a trip, gathering repertoire old and new for an all-American contemporary music residency in London next spring. Friday’s season opener gave a sampling, every piece featuring the group’s core sextet, a consistent cast that changed its stripes with each composer.
The newest sounds were, in order, first a world premiere, “Images,’’ by Richard Cornell, a local composer and BMV veteran (this was his fourth piece for the group). The first movement portrays a flock of unruly sparrows, Geoffrey Burleson’s rumbling piano and Robert Schulz’s cool-menace tom-toms keying the flinty aviary. Then an exotic-mobile nocturne, strings (violinist Bayla Keyes, cellist Jan Müller-Szeraws) giving high-harmonic shine, winds (flutist Ann Bobo, clarinetist William Kirkley) providing spacious chill, the strands seeming to wander before being gathered together with unassuming skill.