The work’s multipart form is punctuated by breaking glass, a siren, and Kirk’s multi-instrumental imitations of electronic sounds. Flanked by nonmetric improvisations, its two swing sections are counted down by Kirk on castanets.
In the album’s liner notes Kirk explained the title: “Rip means Rip Van Winkle (or Rest in Peace?). It’s the way people, even musicians are. They’re asleep. Rig means like rigor mortis. That’s where a lot of people’s minds are. When they hear me doing things they didn’t think I could do they panic in their minds.”
This according to “Doubleness and jazz improvisation: Irony, parody, and ethnomusicology” by Ingrid Monson (Critical inquiry XX/2 [winter 1994] pp. 283–313).
Today would have been Kirk’s 80th birthday! Above, performing at Ronnie Scott’s ca. 1969 or 70 (photo © Del de la Haye); below, the 1965 recording.