Timeline
- 1953: Todd-AO formed as a joint venture of Mike Todd and the American Optical Company for the purpose of developing and distributing a large film format presentation system incorporating a wide, curved screen with multi-channel sound.
- 1986: Acquired Glen Glenn Sound.
- 1999: Todd-AO was acquired by Liberty Media Group and became part of its Liberty Livewire entity.
- 2002: Liberty Livewire was renamed Ascent Media Group.
- 2005: Ascent Media Group was spun off from owner, Liberty Media, into Discovery Holding Company.
- 2007: Discovery Holding Company announced a restructuring plan where it intended to spin off its interest in Ascent Media and combine Discovery Communications with Advance/Newhouse Communications into a new holding company. The reorganization was completed on September 17, 2008.
- 2007: The Todd-AO Scoring Stage closed.
- 2008: What had previously existed as the "Creative Sound Services" division of Ascent Media Group was spun off from Discovery Holding Company to create CSS Studios, LLC, which became a wholly owned subsidiary of Discovery Communications. This transaction included the assets of Todd-AO, Soundelux, Sound One, POP Sound, Modern Music, Soundelux Design Music Group and The Hollywood Edge.
- 2012: CSS Studios, LLC was acquired by Empire Investment Holdings
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