Brad Mehldau's blend of intricate soloing and spare comping make the pianist a sympathetic sideman. On the hard-bop jaunt “The Oneness of Two (In Three),” his pinprick notes frame Joshua Redman's playful sax yelps, and on “Home Motel,” his light, airy playing accompanies Willie Nelson's country croons. He also pops up in the quirky alt-rocker “Divider,” his keys dancing about Scott Weiland's sleepy whisper.