When a full-scale symphony orchestra chooses a municipal car-park for its performances, it’s bound to create a stir. But for Kate Whitley and Christopher Stark, co-founders of the Multi-Story Orchestra, there’s another whole layer of possibilities to explore. They – along with singer-songwriter Abimaro Gunnell – talk to Tom Seligman about how the Orchestra has become an essential part of the community and given young people new ways of making their voices heard.