Question: When did Sound City Studios close?
About the article "Sound City (film)", section "Synopsis".

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Sound City may refer to:  Sound City (company), defunct British amplification company Sound City Studios, music recording studios  "Sound City" (film)  
 Sarm East Studios - London, England Sarm West Studios Sawmills Studio, Golant - Cornwall, England Sound Space Studios - Wales Sound Techniques - London, England Strawberry Studios (also known as "Inner City Studios") - Stockport, England  
Before Shepperton Studios was built, there was Littleton Park, which was built in the 17th century by local nobleman Thomas Wood.
The old mansion still stands on the site.
Scottish businessman Norman Loudon purchased Littleton Park in 1931 for use by his new film company, Sound Film Producing & Recording Studios; the facility opened in 1932.
The studios, which produced both short and feature films, quickly became successful and expanded rapidly.
Proximity to the Vickers-Armstrongs aircraft factory at Brooklands, which attracted German bombers, disrupted filming during the Second World War, as did the requisitioning of the studios in 1941 by the government, who first used it for sugar storage and later to create decoy aircraft and munitions for positioning in the Middle East.
The Ministry of Aircraft Production also took over part of the studios for the production of Vickers Wellington bomber components early in the war.
After re-opening in 1945, the studios changed hands.
When Sir Alexander Korda purchased British Lion Films, he also acquired a controlling interest in Sound City and Shepperton Studios.
Among the films in which he was involved during this period were "The Fallen Idol" (1948) and "The Third Man" (1949), which was shot both at the studios and on location and has been referred to as the best British "film noir".
In spite of such successes, British Lion ran into financial difficulties in the 1950s when it was unable to repay a 1949 loan from the National Film Finance Corporation and subsequently went into receivership.
In 1955, a new company, British Lion Films, was formed and Roy and John Boulting took over at Shepperton Studios.
Their comedies, such as "I'm All Right Jack" (1959), were produced there, as were dramas from other film-makers such as J. Lee Thompson's "The Guns of Navarone" (1961).
The 1968 musical "Oliver!
", also made at the studios, won the Sound Department's Academy Award. 
Three studios were used to produce the album, those being Sound City Studios in Van Nuys, California, Shangri La Studios in Malibu, California, and HQ in San Rafael, California.
On January 1, 2007, Ulrich stated in an interview with "Revolver" that the band would be conceiving the album much like they did their albums prior to working with ex-producer Bob Rock; they would sit down, write a select amount of songs, then enter the studio to record them.
He also quoted Rubin by saying "Rubin didn't want them to start the recording process until every song that they were going to record was as close to 100 percent as possible.
"On March 5, Ulrich revealed that the band had narrowed a potential 25 songs down to fourteen, and that they would begin recording those fourteen on the following week.
He also expanded on Rubin's style of production, saying,On March 14, the band's official website issued a statement: "Metallica left the comfort of HQ this week to descend upon the greater Los Angeles area to begin recording their ninth original album.
This is the first time they've recorded outside of the Bay Area since they spent time at One-on-One Studios recording their self titled album in 1990 and '91."
This was confirmed on July 24, 2008 on Mission: Metallica, as a video surfaced showing the crew moving into Sound City Studios of Nirvana fame.
On June 4, Robert Trujillo revealed that only select portions of the two new songs debuted in Berlin and Tokyo respectively would be featured on the album.
The band hoped to have the album finished by October or November, when the album would be mixed.
He predicted the album would be out in February 2008, and revealed that the songs they were working with were quite long.
On February 2, 2008, Sterlingsound.com revealed that Ted Jensen from Sterling Sound Studios would be mastering the new record.
According to Blabbermouth.net and other sources, Greg Fidelman, who had served as a sound engineer, had also been tapped to mix the album.
Ulrich confirmed on May 15, 2008 that Metallica recorded eleven songs for "Death Magnetic", although only ten would appear on the album due to the constraints of the physical medium.
The eleventh song, titled "Shine" (which was later retitled "Just a Bullet Away"), was a song Hetfield "based around a Layne Staley type, a rock & roll martyr magnetized by death."
 Abbey Road Studios, London Chalice Recording Studios, Hollywood CMK Studios, Los Angeles Conway Studios, Los Angeles Dean Street Studios, London Germano Studios, New York City Henson Recording Studios, Hollywood Maratone Studios, Stockholm Mason Sound, North Hollywood Park Hill Studios, Denver The Rabbit Hole, Calabasas RAK Recording Studios, London Sphere Studios, London The Vault, Stockholm Westlake Studios, Los Angeles