is an album by American pianistreleased on the Mainstream label in 1972.All compositions by Hal Galper. " Trilogy: Convocation " – 7:05 " Trilogy: Wild Bird " – 8:03 " Trilogy: Change Up " – 5:04 " This Moment " – 11:40 " Whatever " – 7:14Hal Galper – electric piano Randy Brecker – trumpet, electric trumpet Michael Brecker – tenor saxophone, soprano saxophone Jonathan Graham – electric guitar Bob Mann – electric guitar Victor Gaskin – bass, electric bass Charles LaChappelle – bass, electric bass Bill Goodwin – drums Billy Hart – drums ___________________________ Released: 1972 Recorded 1971 Length: 39:06 Label: Mainstream MRL 337 Producer: Bob Shad