As the Beatles' Sgt. Pepper's Lonely Hearts Club Band (1967) had done a year earlier, Super Session (1968) initially ushered in several new phases in rock & roll's concurrent transformation. In the space of months, the soundscape of rock shifted radically from short, danceable pop songs to comparatively longer works with more attention to technical and musical subtleties. Enter the unlikely all-star triumvirate of Al Kooper (piano/organ/ondioline/vocals/guitars), Mike Bloomfield (guitar), and Stephen Stills (guitar) - all of whom were concurrently "on hiatus" from their most recent engagements. Kooper had just split after masterminding the groundbreaking Child Is Father to the Man (1968) version of Blood, Sweat & Tears. Bloomfield was fresh from a stint with the likewise brass-driven Electric Flag, while Stills was late of Buffalo Springfield and still a few weeks away from a full-time commitment to David Crosby and Graham Nash…

It was big news in 1969 when former key members of the Byrds, Buffalo Springfield, and the Hollies - three of the finest bands of the '60s-splintered off to form their own trio. Despite their already-proven talents, few could have imagined the gossamer vocal blend that would become the trademark of supergroup Crosby, Stills & Nash. The band's debut effectively provided the soundtrack to the summer of '69.
For his part, Steve Stills keeps exploring the progressive folk-rock sound that he'd pioneered with Buffalo Springfield; signature tune "Suite: Judy Blue Eyes" is an expansive, multi-section affair that makes full use of the group's vocal skills. Fresh from the Hollies, Graham Nash adds an accessible pop sensibility, epitomized by the effervescent ditty "Marrakesh Express"…