The Black Crowes’ mastery at obliging both Jimmy Page’s and Widespread Panic’s fan bases works against them on Croweology, two CDs of favorites performed acoustic. There’s already a popular unplugged version of “She Talks to Angels” out there, but “Jealous Again” still has a headshaking swagger and killer chord change. This is mostly wallpaper, with only a couple of choruses standing out. “My Morning Song” comes off as a slipperier take on the Allman Brothers’ “Ain’t Wastin’ Time No More,” and “Thorn in My Pride” represents a second disc that drowns in harmonica. You’re better off with 1999’s kinda-fun By Your Side, which was at least motivated, or the Crowes’ debut, Shake Your Money Maker, which had hits and a sense of purpose.