After a slew of multidisc sets devoted to key points in the career of Miles Davis, you'd think Columbia Records would have unearthed every speck of consequential music by now. But not quite.
This week, Columbia brings out Live in Europe 1969: The Bootleg Series Vol. 2 — a three-CD, one-DVD set devoted to the jazz maverick's "lost" quintet, his touring band from 1969.