ロックと融合したフュージョンへの転機となる、素晴らしいアルバムです。
録音：
Disc 1
1972年10月I.B.C.Studio, London〈1.-3〉
1973年 Quiet Village, Long Ilamd, NY Live〈4.-6.〉、8月 Record Plant, NY〈7.-9.〉
Disc 2
1974年7，8月 Record Plant, NY〈1.-3. 5. 6.〉
1975年1月 Record Plant, NY〈7.-10〉、3月 Electric Lady Studios, NY〈4.〉
演奏者： Chick Corea / piano, organ, synthesizer, percussion, vocal
Joe Farrell / Tenor saxophone, flute(Disc 1: 1.-3.)
Bill Connors / guitar(Disc 1: 1.-6.)
Al DiMeola / guitar(Disc 2)
Stanley Clarke / bass, synthesizer, vocal
Mingo Lewis / percussion(Disc 1: 4.-6.)
Airto Moreira / percussion, drums(Disc 1: 1.-3.)
Flora Purim / percussion, vocal(Disc 1: 1.-3.)
Lenny White / percussion, drums (Disc 1: 7.-9., Disc 2)
Steve Gadd / drums(Disc 1: 4.-6.)
曲目：
Disc 1
1. 50 Miles High
2. Captain Marvel
3. Light As A Feather
4. Spain
5. After The Cosmic Rain)
6. Bass Folk Song
7. Hymm Of The Seventh Galaxy
9. Theme To The Mothership
Disc 2
1. Vulcan Worlds
2. Beyond The Seventh Galaxy
3. Earth Juice
4. The Shadow Of Lo
5. Where Have I Known You Before
6. Song To The Pharoah Kings
7. Dayride
8. No Mystery
9. Flight Of The Newborn
10. Celebration Suite (Part I & II)
Joe Farrell / Tenor saxophone, flute(Disc 1: 1.-3.)
Bill Connors / guitar(Disc 1: 1.-6.)
Al DiMeola / guitar(Disc 2)
Stanley Clarke / bass, synthesizer, vocal
Mingo Lewis / percussion(Disc 1: 4.-6.)
Airto Moreira / percussion, drums(Disc 1: 1.-3.)
Flora Purim / percussion, vocal(Disc 1: 1.-3.)
Lenny White / percussion, drums (Disc 1: 7.-9., Disc 2)
Steve Gadd / drums(Disc 1: 4.-6.)
曲目：
Disc 1
1. 50 Miles High
2. Captain Marvel
3. Light As A Feather
4. Spain
5. After The Cosmic Rain)
6. Bass Folk Song
7. Hymm Of The Seventh Galaxy
9. Theme To The Mothership
Disc 2
1. Vulcan Worlds
2. Beyond The Seventh Galaxy
3. Earth Juice
4. The Shadow Of Lo
5. Where Have I Known You Before
6. Song To The Pharoah Kings
7. Dayride
8. No Mystery
9. Flight Of The Newborn
10. Celebration Suite (Part I & II)