Tom Moon

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.

The spread of formal jazz education has created a new breed of global musician: one who uses improvisation, and other devices associated with jazz, to transform folk and traditional music. The Albanian singer Elina Duni is part of this rising class. Her latest release, Matane Malit ("Beyond the Mountain"), offers a transfixing balance of old and new.

When the pianist Esbjorn Svensson died in a scuba accident in 2008, many fans of his group, the Swedish trio known as E.S.T., wondered if there might be some unreleased experiments lurking in a studio vault. There were. Just out is a disc called 301, which was recorded in 2008 during sessions for the group's final album.