The Electric Squeezebox Orchestra is the Bay Area’s own 17-piece big band, led by trumpeter Erik Jekabson, playing music composed and arranged by its members. The composers and arrangers, some of the very best in the Bay, draw from a wide variety of influences but always come up with powerful music with groove, beauty and subtlety. The band, which started a steady Sunday residency at the California Jazz Conservatory in March, has colloborated with a number of special guest artists, including John Santos, Kenny Washington, Alan Ferber, Dayna Stephens, Mads Tolling, Sandy Cressman, Kellye Gray, Avotcja, Spok and Ben Goldberg.