From the liner notes of John Coltrane’s Interstellar Space.
For a perfectionist such as John Coltrane, the studio was the place to refine his latest concepts. In February 1967, debate was still raging among his fans over the defection of his longstanding sidemen - so the studio might have seemed a sanctuary to Coltrane as well.
Rashied Ali was the anointed replacement in the Coltrane drum chair, and the two men, recorded as a duo, produced something both ecstatic and austere - something so different from what Coltrane had ever dared to play in a live setting that the music seems to emanate from and move toward another space.
Images are from the CD booklet.