The Don Heckman–Ed Summerlin Improvisational Jazz Workshop

The Don Heckman–Ed Summerlin Improvisational Jazz Workshop is the first and only album released by the group of the same name, led jointly by alto saxophonist Don Heckman and tenor saxophonist Ed Summerlin, recorded in September 1965 and March 1966, and released in 1967 on their own, recently established Ictus label, with Heckman and Summerlin each composing two of the album's four tracks. The eponymous LP would be re-released the following year on the English Jazz Workshop label as Jax or Bettor.

Described in Heckman's liner notes as "a laboratory for the continuing exploration of new music," the group existed from 1964 to 1972, "[i]ts materials includ[ing] jazz, electronic music, happenings, theatrical events, dance, film, religious services, written music, improvised music, and chance music." The album also provided an early showcase for pianist Steve Kuhn, as well as bassists Ron Carter and Steve Swallow (the latter heard here approximately five years before switching exclusively to electric bass).