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What do "Lo/Ro" and "Lt/Rt" stand for? | Home Theater Forum
https://www.hometheaterforum.com/community/threads/what-do-lo-ro-and-lt-rt-stand-for.30803/#:~:text=LT%2FRT%20stands%20for%20Left%20Total%20%2F%20Right%20Total.,I%20haven%27t%20heard%20the%20term%20LO%2FRO%20before%2C%20though.
What Is Downmixing? Part 2: Surround (LtRt) | TV Tech
https://www.tvtechnology.com/opinions/what-is-downmixing-part-2-surround-ltrt
This is the default downmix mode of most cable and satellite set-top boxes for two-channel audio output, usually via red and white RCA or pin-jack connectors. The LtRt signal is more complex to generate and relies on upstream Dolby Digital (AC-3) encoding equipment to perform some pre-processing to get it right.
What do "Lo/Ro" and "Lt/Rt" stand for? | Home Theater Forum
https://www.hometheaterforum.com/community/threads/what-do-lo-ro-and-lt-rt-stand-for.30803/
LT/RT stands for Left Total / Right Total. As you surmised, this is the term for a two channel mix that contains a matrixed multichannel mix. Though I see LT/RT all the time in post production, I haven't heard the term LO/RO before, though.
5 Broadcast Audio Spec Sheet Terms Every Editor Must ...
https://blog.frame.io/2017/08/09/audio-spec-sheet/
Surround Sound Explained: Part 5 - Sound on Sound
https://www.soundonsound.com/techniques/surround-sound-explained-part-5
The Dolby Digital decoder can provide two versions of stereo downmixing, which are known as Lt/Rt and Lo/Ro, or 'surround' and 'stereo' respectively. The first is a Dolby Pro Logic-compatible version with matrixed centre and mono surround channels within the left and right information (see part two of this series for a refresher on Dolby Pro Logic).
Dolby Metadata Guide
https://developer.dolby.com/globalassets/professional/documents/dolby-metadata-guide.pdf
Lt/Rt The Dolby E bitstream contains both the 5.1- and two-channel programs’ encoded audio, and each program's metadata. The Dolby Digital bitstream contains a single program’s encoded audio and corresponding metadata. DP572 Dolby E Decoder Metadata Decoded Dolby E bitstream delivers both the 5.1- and two-channel programs’ encoded audio along with
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