Meshell Ndegeocello opens the lid on her self-contained world Enlarge this image toggle caption Courtesy of the artist Courtesy of the artist Realness is a root position in The Omnichord Real Book, Meshell Ndegeocello's expansive yet interior new album. Ndegeocello, whose father was an accomplished saxophonist in U.S. Army bands, tends to hold the word "jazz" at arm's length — …