In 2021 Pennebaker Hegedus Films released a restored version, which credits the additional personnel:
Producers:
Natalie Seaver (producer)
Edith Van Slyck (executive producer)
Lyn Lear (executive producer)
Restoration:
Chris Hegedus (restoration supervisor)
Frazer Pennebaker (restoration supervisor)
Nate Pennebaker (restoration supervisor)
Ian Bostick (restoration artist)
Maurice Schechter (audio digitization)
Matt Gundy (audio remaster)
David Gauff (online editor & colorist)
John Rizzo (4K scanning)
Special Thanks:
Thom Powers
Mark Lipson