Probably recorded Nov. 17th, 1970 at the Spectrum in Philadelphia, PA. Miles, Airto Moriera and Michael Henderson are visible; Keith Jarrett and Jack DeJohnette can be heard. Gary Bartz was probably the saxophonist that night. http://www.plosin.com/milesahead/Sessions.aspx?s=701117 MORE COMPLETE VIDEO AVAILABLE http://www.youtube.com/watch?v=_hicY0e8uno