Gary George Peacock was an American jazz double bassist. He recorded a dozen albums under his own name, and also performed and recorded with major jazz figures such as avant garde saxophonist Albert Ayler, pianists Bill Evans, Paul Bley and Marilyn Crispell, and as a part of Keith Jarrett’s “Standards Trio” with drummer Jack DeJohnette. The trio existed for over thirty years, and recorded over twenty albums together. DeJohnette once stated that he admired Peacock's "sound, choice of notes, and, above all, the buoyancy of his playing." Marilyn Crispell called Peacock a "sensitive musician with a great harmonic sense."

Marilyn Crispell is an American jazz pianist and composer. Scott Yanow described her as "a powerful player... who has her own way of using space... She is near the top of her field." Jon Pareles of The New York Times wrote: "Hearing Marilyn Crispell play solo piano is like monitoring an active volcano... She is one of a very few pianists who rise to the challenge of free jazz." In addition to her own extensive work as a soloist or bandleader, Crispell is also known as a longtime member of saxophonist Anthony Braxton's quartet in the 1980s and '90s.