Herbie Hancock's V.S.O.P. project with his former bandmates from the Miles Davis Quintet – Ron Carter, Wayne Shorter, Tony Williams – and trumpeter Freddie Hubbard was a band that almost single-handedly tried to re-establish acoustic jazz in the United States. And though they made three recordings, all of which were favorably reviewed and heralded by true jazz fans, none of them sold very well, and the band could find few gigs in the United States. The 1978 tour of major cities was thought to be a triumph at the time, but the unit could find few gigs afterward, and so its various members all went back to their other projects. In 1979, they got the opportunity to tour Japan and jumped at the chance. Sony, Hancock's Japanese label, recorded the two evenings, and the first, which took place during a furious rainstorm, was broadcast live on national television! Live Under the Sky marks the first time that this album has been available in the United States in any form.

The audio companion to David Toop's excellent book advances the case he made, that Les Baxter, Aphex Twin, The Beach Boys, Herbie Hancock, King Tubby and My Bloody Valentine are all related by their effect on sound pioneering. A double-disc set, Ocean of Sound impresses not only with its incredible diversity of musical styles, but with how easily these artists work next to each other. The second disc includes consecutive contributions by Paul Schütze, the Velvet Undergound, Holger Czukay of Can, The Beach Boys, African Headcharge and Sun Ra. Besides illustrating Toop's point beautifully, the album is an excellent addition to the collection of any wide-ranging ambient fan.

Nefertiti, the fourth album by Miles Davis' second classic quintet, continues the forward motion of Sorcerer, as the group settles into a low-key, exploratory groove, offering music with recognizable themes – but themes that were deliberately dissonant, slightly unsettling even as they burrowed their way into the consciousness. In a sense, this is mood music, since, like on much of Sorcerer, the individual parts mesh in unpredictable ways, creating evocative, floating soundscapes. This music anticipates the free-fall, impressionistic work of In a Silent Way, yet it remains rooted in hard bop, particularly when the tempo is a bit sprightly, as on "Hand Jive." Yet even when the instrumentalists and soloists are placed in the foreground – such as Miles' extended opening solo on "Madness" or Hancock's long solo toward the end of the piece – this never feels like showcases for virtuosity, the way some showboating hard bop can, though each player shines.

The follow-up to the breakthrough Headhunters album was virtually as good as its wildly successful predecessor: an earthy, funky, yet often harmonically and rhythmically sophisticated tour de force. There is only one change in the Headhunters lineup – swapping drummer Harvey Mason for Mike Clark – and the switch results in grooves that are even more complex. Hancock continues to reach into the rapidly changing high-tech world for new sounds, most notably the metallic sheen of the then-new ARP string synthesizer which was already becoming a staple item on pop and jazz-rock records. Again, there are only four long tracks, three of which ("Palm Grease," "Actual Proof," "Spank-A-Lee") concentrate on the funk, with plenty of Hancock's wah-wah clavinet, synthesizer textures and effects, and electric piano ruminations that still venture beyond the outer limits of post-bop.

With the 1968 album Miles in the Sky, Miles Davis explicitly pushed his second great quintet away from conventional jazz, pushing them toward the jazz-rock hybrid that would later become known as fusion. Here, the music is still in its formative stages, and it's a little more earth-bound than you might expect, especially following on the heels of the shape-shifting, elusive Nefertiti. On Miles in the Sky, much of the rhythms are straightforward, picking up on the direct 4/4 beats of rock, and these are illuminated by Herbie Hancock's electric piano – one of the very first sounds on the record, as a matter of fact – and the guest appearance of guitarist George Benson on "Paraphernalia." All of these additions are tangible and identifiable, and they do result in intriguing music, but the form of the music itself is surprisingly direct, playing as extended grooves. This meanders considerable more than Nefertiti, even if it is significantly less elliptical in its form, because it's primarily four long jams.

Fourteen years after his last solo outing, STILLS ALONE, Stephen Stills unveiled 2005's MAN ALIVE!, a remarkably vital and dynamic album that features the veteran performer penning almost every song and playing many of the record's instruments. Although David Crosby is absent, Stills's other CSNY mates, Graham Nash and Neil Young, turn up separately. While Nash subtly sticks to backing-vocal duty, Young contributes his typically incendiary electric-guitar lines to the hard-rocking "'Round the Bend" and offers up vocal harmonies and acoustic-guitar work on the spare, soulful "Different Man." A more unlikely cameo comes in the form of pianist Herbie Hancock's prominent presence on the 11-minute epic "Spanish Suite," which also features Latin percussion great Willie Bobo. Of course, Stills is the main attraction on MAN ALIVE!, with his husky voice carrying every song, including the socially conscious CSN-like track "Feed the People" and the blues-tinged "Piece of Me".

Miles Davis' concert of February 12, 1964, was divided into two LPs, with all of the ballads put on My Funny Valentine. These five lengthy tracks (specifically, "All of You," "Stella by Starlight," "All Blues," "I Thought About You," and the title cut) put the emphasis on the lyricism of Davis, along with some strong statements from tenor saxophonist George Coleman and freer moments from the young rhythm section of pianist Herbie Hancock, bassist Ron Carter, and drummer Tony Williams. This hour-long LP complements the up-tempo romps of Four & More.

Sorcerer, the third album by the second Miles Davis Quintet, is in a sense a transitional album, a quiet, subdued affair that rarely blows hot, choosing to explore cerebral tonal colorings. Even when the tempo picks up, as it does on the title track, there's little of the dense, manic energy on Miles Smiles – this is about subtle shadings, even when the compositions are as memorable as Tony Williams' "Pee Wee" or Herbie Hancock's "Sorcerer." As such, it's a little elusive, since it represents the deepening of the band's music as they choose to explore different territory. The emphasis is as much on complex, interweaving chords and a coolly relaxed sound as it is on sheer improvisation, though each member tears off thoroughly compelling solos. Still, the individual flights aren't placed at the forefront the way they were on the two predecessors – it all merges together, pointing toward the dense soundscapes of Miles' later '60s work.

Blending a socially conscious spirit with hard bop, jazz-funk, and electronic elements, Power to the People finds Joe Henderson saxophonist entering a new creative dimension, as he performs such originals as “Isotope,” “Afro-Centric” and the first recording of his classic “Black Narcissus,” alongside such legends as Herbie Hancock (piano, Fender Rhodes), Ron Carter (electric and acoustic bass), Jack DeJohnette (drums), and Mike Lawrence (trumpet). Available on 192/24 hi res digital.