Title: Saw IV
Content:  Saw IV is a 2007 horror film directed by Darren Lynn Bousman from a screenplay by Patrick Melton and Marcus Dunstan, and a story by Melton, Dunstan, and Thomas Fenton. It is the fourth installment in the Saw film series, the third directed by Bousman. The film stars Tobin Bell, Scott Patterson, Costas Mandylor, Betsy Russell, and Lyriq Bent. The plot follows Daniel Rigg, a police officer obsessed with rescuing the Jigsaw Killer's victims, who finds himself the focus of Jigsaw's latest series of tests, in which he must rescue his partners, Eric Matthews and Mark Hoffman, while learning to overcome his obsession. The film also explores John Kramer's legacy and his ability to manipulate people into continuing his work after his death, while providing more of his backstory and an additional explanation as to why he became Jigsaw. Saw IV was the first film in the franchise to not be written by Leigh Whannell. It was released by Lionsgate in the United States on October 26, 2007, and received generally negative reviews from critics. Despite this, the film was a box office success, grossing $139 million worldwide. A sequel, titled Saw V, was released in 2008.
Title: Saw IV
Content:  The soundtrack was released on October 23, 2007, by WEA/Warner Bros. Records. The film's theme song "I.V." was written by Yoshiki and performed by the rock group X Japan.
Title: Saw V
Content:  in Saw IV. David Hackl served as the production designer of Saw II, Saw III, and Saw IV and second-unit director for Saw III and Saw IV before making his directorial debut with Saw V. Patrick Melton and Marcus Dunstan, the writers of the previous film, returned to write the film. Charlie Clouser, who provided the score for all previous Saw films, also returned to compose the score for the film. Saw creators James Wan and Leigh Whannell served as executive producers. Saw V was released by Lionsgate in the United States on October 24, 2008, and received generally negative reviews from critics. Despite this, the film was a box office success, grossing $113.9 million worldwide. A sequel, Saw VI, was released in 2009.
Title: Saw IV (soundtrack)
Content:  Saw IV: Original Motion Picture Soundtrack is the soundtrack for the 2007 film Saw IV. It was released on October 23, 2007 by Artists' Addition Records. The song "I.V." by X Japan, which plays over the closing credits, was not included on the soundtrack album.
Title: Saw IV (score)
Content:  Saw IV: Original Motion Picture Score is the film score for the 2007 horror film Saw IV. The score has a total of 63 tracks, including mixes and alternates of certain tracks. Unlike the previous scores, this was not licensed to any recording company and therefore was not commercially distributed.
Title: Saw IV
Content:  For Saw IV, there was a hunt for a director before it was officially stated that Darren Lynn Bousman, who had originally passed on it, would again direct the fourth installment, with creators and executive producers James Wan and Leigh Whannell also returning. Principal photography took from April 16, 2007 to May 3, 2007. The filming location was Toronto, Ontario; the same place where both Saw II and Saw III were filmed. The post-production period began on 19 May. As Whannell was uninterested in writing any more Saw films, Twisted Pictures sought new writers and ideas for the fourth Saw film. An executive discovered Marcus Dunstan and Patrick Melton and read their script The Midnight 
Title: Saw (2004 film)
Content:  The soundtrack was mainly composed by Charlie Clouser, and took six weeks to complete. Other songs were performed by Front Line Assembly, Fear Factory, Enemy, Pitbull Daycare and Psychopomps. Megadeth's song "Die Dead Enough" was originally set to be featured in the film, but was not used for undisclosed reasons. The soundtrack was released on October 5, 2004 by Koch Records. Johnny Loftus of AllMusic gave it three out of five stars. He said that Clouser "really nails it with his creaky, clammy score" and that he "understands that Saw horror only works with a heady amount of camp, and he draws from industrial music in the same way". He particularly liked, "Cigarette"; "Hello, Adam"; and "F**k This S*!t", commenting that they "blend chilling sounds with harsh percussion and deep-wound keyboard stabs".
Title: Saw IV
Content: Tobin Bell as John Kramer ; Costas Mandylor as Detective Mark Hoffman ; Scott Patterson as Agent Peter Strahm ; Betsy Russell as Jill Tuck ; Lyriq Bent as Officer Daniel Rigg ; Athena Karkanis as Agent Lindsey Perez ; Justin Louis as Art Blank ; Simon Reynolds as Officer Lamanna ; Donnie Wahlberg as Detective Eric Matthews ; Angus Macfadyen as Jeff Denlon ; Shawnee Smith as Amanda Young ; Bahar Soomekh as Lynn Denlon ; Dina Meyer as Detective Kerry ; Mike Realba as Detective Fisk ; Marty Adams as Ivan Landsness ; Sarain Boylan as Brenda ; Billy Otis as Cecil Adams ; James Van Patten as Dr. Heffner ; Kevin Rushton as Trevor ; Julian Richings as Vagrant ; Ingrid Hart as Tracy Rigg ; Niamh Wilson as Corbett Denlon ; Janet Land as Morgan ; Ron Lea as Rex ; Tony Nappo as Gus ; Emmanuelle Vaugier as Addison ; Noam Jenkins as Michael ; Mike Butters as Paul ; J. Larose as Troy ; Oren Koules as Donnie Greco ; Alison Luther as Jane 
Title: Saw V (Original Motion Picture Soundtrack)
Content:  Saw V (Original Motion Picture Soundtrack) is the soundtrack for the film 2008 horror film Saw V. It was composed by Charlie Clouser, who also composed the music for Saw II, III and IV.
Title: Saw V
Content:  Saw V was written by Saw IV writers Patrick Melton and Marcus Dunstan, though Darren Lynn Bousman, who had directed all Saw films since Saw II, affirmed in July 2007 that he would not direct another sequel. Thomas Fenton also joined Dunstan and Melton as writer to the film, though Marek Posival was attached to write as well at one point. The film went into production after Christmas 2007. Principal photography took place from March 17 to April 28, 2008 in Toronto. By mid-July 2008, there had been three photos released of David Hackl at the set of Saw V. The first trailer, depicting Agent Strahm's box trap, was released at Comic-Con 08 as a short clip and the trailer was also shown before The X-Files: I Want to Believe. The website opened on August 6, 2008. On September 17, 2008, a new clip was available on the Saw V website, depicting the Pendulum Trap.

Question: Who was the composer of Saw IV?
Answer: Charlie Clouser.
Charles Alexander Clouser.