A notable full-length album tribute is due in August: Zeitkratzer’s “Lou Reed: Metal Machine Music” (Asphodel), which transcribes Mr. Reed’s worst-selling 1975 album — originally an opus of guitar feedback — for chamber ensemble, followed by Mr. Reed himself with a climactic solo. Played by a live group, “Metal Machine Music” sounds even wilder and more frenetic, and Zeitkratzer’s act of fandom — countless work-hours involved in transcribing and orchestrating — moves “Metal Machine Music” into a context where, perhaps, it always belonged: as an avant-garde piece of bristling minimalism rather than a rock musician’s bizarre experiment.