Music to code by, plant by, chill with...

Stravinsky - The Firebird Suite
Conductor Pierre Boulez with Orchestre de Paris
Live at the Salle Pleyel, Paris, France, Dec 1, 2008 afternoon concert. An FM recording broadcast Dec 11, 2008.

Miles Davis - Belgrade 1971
The Newport Jazz Festival In Belgrade 1971
Live at the Union Hall, Belgrade, Serbia (the former Yugoslavia). November 3, 1971. Very good radio broadcast.

... this fest was "brought" to Belgrade and the Newport Jazz Festival in Belgrade started in 1970, where, according to Europe Jazz Network, "this festival hosted almost everyone who's important in jazz history."

... or maybe get raucous with:

The Rolling Stones - Chicago '72
She Liked the Way I Held the Microphone
Live at the International Ampitheatre, Chicago, Illinois. June 20, 1972, second show. Good to very good audience recording.