this period, he was using cocaine heavily. Drugs were present in large quantities during the concert. A smudge of cocaine on Neil Young's nose was obscured in post-production. Post-concert production Following the concert, Scorsese filmed for several days on an MGM studio soundstage, with the Band, the Staple Singers and Emmylou Harris. The Band's performance of "The Weight" with the Staple Singers was included in the film instead of the concert version. The Band and Harris performed "Evangeline", which was also included in the film. Interviews with group members were conducted by Scorsese at the Band's Shangri-La Studio in Malibu, California. Additionally, Robertson composed "The Last Waltz Suite", parts of which were used as a film score. Finally, according to musical director John Simon, during post-production, the live recording was altered to clean up "playing mistakes, out-of-tune singing, bad horn-balance in the remote truck. Only Levon's part was retained in its entirety." Due to Scorsese's commitments on New York, New York and another documentary, American Boy: A Profile of Steven Prince, the film's release was delayed until 1978. During the editing process, Scorsese and Robertson became friends, and frequently collaborated on further projects, with Robertson acting as music producer and consultant on Raging Bull, The King of Comedy, The Color of Money, Casino, Gangs of New York, The Departed and Shutter Island. Reception Critical reception {{quote box | align = right| width = 25em | bgcolor = MistyRose | quote = More than being a collection of impressively filmed and virtuosically mixed 'live' songs, "The Last Waltz" ranks as probably the finest record of a rock concert ever put on film.| source = Hartford Courant<ref>"Scorsese's 'Last Waltz'", Hartford Courant, June 16, 1978</ref>}} The film has been hailed critically, listed among the greatest concert films. On review aggregator Rotten Tomatoes, the film holds an approval rating of 98% based on 50 reviews, with an average rating of 8.50/10. The website's critical consensus reads, "Among one of, if not the best rock movie ever made, The Last Waltz is a revealing, electrifying view of the classic band at their height." Chicago Tribune film critic Michael Wilmington calls it "the greatest rock concert movie ever made – and maybe the best rock movie, period". Terry Lawson of the Detroit Free Press comments that "This is one of the great movie experiences." Total Film considers it "the greatest concert film ever shot". Janet Maslin