“I Can’t Go To Sleep,” off Wu-Tang Clan’s The W, is one of RZA’s least-produced songs, technically speaking. He simply loops the intro to Issac Hayes’s “Walk On By” a few times, making no attempt to mask the sample with a snare or keyboard stab of his own. Yet it is one of his best, the sort of production that they’ll play at his Kennedy Center Honors someday. The song works because of the success of the whole formula – the yearning sample, Ghostface’s extended opening verse, Hayes’s own guest-spot on the bridge, and then RZA’s closing remarks. The bare sample plays perfectly against Ghost and RZA’s choked-up pleas – another layer would be too heavy, and RZA no doubt knew this. Always more of a collagist than a pure creator of sound (like Dr. Dre or Timbaland), RZA’s understanding that A + the snare from B + Inspectah Deck = classic is what carried the Wu to prominence in the 90’s. His grasp of tone and sequence and balance is also why he is slowly and successfully transitioning out of beats 24/7 and into movie scores and acting and directing....