O3A Upmixer - 7.1.2 (Dolby Atmos)
|Input||10||7.1.2 (Dolby Atmos)|
This plugin takes a surround mix prepared for a 7.1.2 system and converts it to third order ambisonics (O3A).
7.1.2 is a standard mix format for beds in Dolby Atmos. It adds two ceiling channels to standard 7.1. Please note that this plugin does not process Dolby Atmos bitstreams directly.
The channel ordering used is:
|1||Front Left||Front Left|
|2||Front Centre||Front Right|
|3||Front Right||Front Centre|
|4||Left Surround Side||LFE|
|5||Right Surround Side||Left Surround Rear|
|6||Left Surround Rear||Right Surround Rear|
|7||Right Surround Rear||Left Surround Side|
|8||LFE||Right Surround Side|
|9||Left Top Surround||Left Top Surround|
|10||Right Top Surround||Right Top Surround|
Please note that the channel ordering used by Dolby's Atmos RMU may differ. Also, the AAX order above is used when plugins interact with ProTools through the AAX software interface; other parts of ProTools may use a different default order, for instance when exporting to file.
The plugin is available in the O3A Upmixers plugin library.
Three modes are supported, "Inferred", "Studio" and "Virtual". Generally, "Inferred" or "Studio" are recommended.
|Inferred||This mode is optimised for use with material that has been mixed using conventional panning techniques, such as equal-power panning or VBAP. The approach produces smooth transitions when sounds pass between speaker locations.|
|Studio||This mode is optimised for use with material that has been mixed using 'pairwise' panning, for instance in Pro Tool Ultimate's surround panner. The approach produces smooth transitions when sounds pass between speaker locations. In this mode, the corner layout is always assumed to be Square.|
|Virtual||This mode simply places each of the main (non-LFE) audio channels in their appropriate speaker direction. This can be worth trying when the mix has not been put together by conventional panning and the channels have a complex phase relationship.|
Audio from the LFE channel can be mixed into the output by setting this dial. It is added to the stream as an omnidirectional signal.
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