The prodigious tenor saxist Ivo Perelman joins together with guitarist Joe Morris for a handful of improvised duets on this recent release. Perelman reaches the stratosphere in altissimo’d altissimos on “Invisible Mass” while brooding in blue with Morris’ strums on “Gravitational Pull”. The two create dots and dashes on “Elliptical Time” and exchange punches like middleweights during “Cosmic Ray Music”. The two get bopping on “Palpable Energy” before Perelman starts squeaking out of the theme. The tunes last between 7-15 minutes, with the tunes having the foundation of an elevator shaft.