Raising Sand Robert Plant and Alison Krauss UMA THE teaming of Led Zep’s frontman with America’s country- bluegrass queen doesn’t read like a match made in roots- rock heaven, but it sounds like it. Robert Plant and Alison Krauss meld exquisitely on these 13 songs. Producer T- Bone Burnett can take great credit, not only for extracting wonderful performances from the two singers but for choosing and arranging a batch of songs to suit them. It’s like Daniel Lanois’s work on Emmylou Harris’s Wrecking Ball , with Burnett constructing ambient, warm textures ( particularly from the guitars, played by him and Marc Ribot) around the vocals. Surprisingly, it’s often Krauss who pushes herself, with Plant acting as a subtle, delicate foil. The treatment of the Everly Brothers’ rocker Gone Gone Gone ( Done Moved On) is a prime example, as is Krauss’s reading of Sam Phillips’s Sister Rosetta Goes Before Us . Plant takes command on the mournful Please Read the Letter , a song he co- wrote, and on the shimmering Gene Clark ballad Polly Come Home. However, the album’s unerring charm comes from the duo’s seduction of the microphone, with voices that are three parts honey to one part gin. Sublime.