Test of the Boomerang: Soundchecks, Rehearsals and Outtakes, Part One Continue Reading Test of the Boomerang: Soundchecks, Rehearsals and Outtakes, Part One Ben Wiser April 15, 2009 1 Min Read The Grateful Dead collection at the Live Music Archive contains not only thousands of Grateful Dead concerts, it also holds a good number of band rehearsal, soundcheck, and studio session… Music, Test of the Boomerang