Performer: Tyshawn Sorey

It was like a quiet day in a sunny room. The air was still, shadows and colors changed as the sun moved across the sky, but nothing inside the room ever actually moved.

The Mostly Mozart Festival continued Sunday afternoon with another program of new music – quite literally, as all were world premières – from two more young composers. Tyshawn Sorey, in addition to being a composer, is a jazz instrumentalist and improviser, though the distinction between composer and improviser quickly breaks down in his practice.