The name

Trio 3

may sound redundant, but when the three in question are saxophonist

Oliver Lake

, bassist

Reggie Workman

and drummer

Andrew Cyrille

, little else needs to be said. The group has reunited for a 20th anniversary of their always-fruitful collaboration.

All three came of musical age in the fertile free-jazz environment of the late 1960s and early 1970s. Lake was a co-founder of the World Saxophone Quartet, which recently marked its 30th anniversary; Philly native Workman made his name playing with John Coltrane in the early '60s and has since accompanied a who's-who of jazz legends and led his own innovative projects; and among his many collaborations, Cyrille boasts a relationship with legendary pianist Cecil Taylor that lasted well over a decade. Expect powerhouse playing - not to be missed.

Philadelphia Museum of Art, 26th Street & Ben Franklin Parkway, 5:45 and 7:15 tonight, free with regular museum admission of $14, 215-763-8100, www.philamuseum.org.

- Shaun Brady