A sampling of the most recent developments in percussion music over the last half-decade. Australian-born, but Berlin-based Thomas Meadowcroft relays the migratory flight patterns of the great knot, while Matthew Shlomowitz investigates everyday and pop culture in Popular Contexts #6. Steve Snowden’s A Man with a Gun Lives Here takes its cues from Depression-era hobo code with new commissions by Berkeley and Stanford alumni, David Coll and Andrew Greenwald, completing the program.