Penteo Demo Room at the 2008 Audio Engineering Show in San Francisco |
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Penteo is a digital audio, stereo-to-5.1 surround conversion process based on a mashup of Avery Lee's open source Center Cut algorithm from VirtualDub combined with Hans Van Zutphen's freeware Tape Restore Live azimuth corrector. The process was integrated into a real-time unit and audio remastering service by John Wheeler of Berkeley, CA, and now marketed by the company PenteoSurround, Inc.
The process is based on Lee's DSP cross-correlation algorithm, that parses out individual stereo components that the original mixer channeled to the specific panorama locations of a stereophonic mix.
It was first demonstrated publicly at the Surround Expo in Los Angeles in 2005.
The technology was used extensively on the Watchmen and Quentin Tarantino's Inglourious Basterds motion picture productions.