Glenn Branca's compositions often center around multiple guitars -- four or more, heavily amplified -- augmented by a rock-based rhythm section of drums and bass. In later works, the composer began adding other instruments, including mallet guitar, keyboards, and occasionally a second drummer. Branca's minimalist compositions frequently require unusual guitar tunings -- some works have them strung with two sets of three strings tuned an octave apart. Many of downtown New York City's more notable experimental guitarists were members of his groups, including Thurston Moore and L...