Stretching Out is from the album Emphasis & Flight by Jimmy Giuffre, Paul Bley and Steve Swallow, recorded 7th and 23rd November, 1961 in Germany.

At a time when the leading edge of mainstream jazz was pulling through modal jazz into hard bop, Jimmy Giuffre was headed in another direction. His early trios were simultaneously polite and experimental, an unusual combination that revealed both his cool roots and his fearlessness in stepping over the cliff. Nowhere were these qualities more evident than on his early-’60s trio records alongside pianist Paul Bley and bassist Steve Swallow. [source]

Jimmy Giuffre – Clarinet
Paul Bley – Piano
Steve Swallow – Double Bass