Binaural Surround - Auro-3D 9.1, 10.1, 11.1 and 13.1
Host Support
Binaural Surround - Auro-3D 9.1
| Host Type | Support |
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| AAX | Yes, input mapped to 5.1.4 |
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| VST2 | Yes |
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Binaural Surround - Auro-3D 10.1
| Host Type | Support |
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| AAX | Yes, input mapped to 7.0.4 |
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| VST2 | Yes |
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Binaural Surround - Auro-3D 11.1
| Host Type | Support |
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| AAX | Yes, input mapped to 7.1.4 |
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| VST2 | Yes |
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Binaural Surround - Auro-3D 13.1
| Host Type | Support |
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| AAX | Yes, input mapped to 7.1.6 |
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| VST2 | Yes |
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Audio
Binaural Surround - Auro-3D 9.1
| Channels | Content |
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| Input | 10 | Auro-3D 9.1 (mapped to 5.1.4 for AAX) |
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| Output | 2 | Binaural Stereo |
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Binaural Surround - Auro-3D 10.1
| Channels | Content |
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| Input | 11 | Auro-3D 10.1 (mapped to 7.0.4 for AAX) |
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| Output | 2 | Binaural Stereo |
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Binaural Surround - Auro-3D 11.1
| Channels | Content |
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| Input | 12 | Auro-3D 11.1 (mapped to 7.1.4 for AAX) |
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| Output | 2 | Binaural Stereo |
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Binaural Surround - Auro-3D 13.1
| Channels | Content |
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| Input | 14 | Auro-3D 13.1 (AAXCM_GEN14 for AAX) |
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| Output | 2 | Binaural Stereo |
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Controls
Description
There are four Binaural Surround plugins for processing Auro-3D surround mixes. These correspond to each of the Auro-3D 9.1, Auro-3D 10.1, Auro-3D 11.1 and Auro-3D 13.1 speaker layouts. They convert the mixes to 3D stereo to be listened to on headphones.
The AAX versions of these specific plugins require Pro Tools 2023.6 or later.
The 3D aspects of the stereo are synthesised using HRTF data. This models how sound from different directions is changed as it passes around the head.
Channels
The channel orderings used for 9.1 use the following table. AAX is mapped to the 5.1.4 speaker layout.
| Channel | AAX | VST |
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| 1 | Front Left | Front Left |
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| 2 | Front Centre | Front Right |
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| 3 | Front Right | Front Centre |
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| 4 | Surround Left | LFE |
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| 5 | Surround Right | Surround Left |
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| 6 | LFE | Surround Right |
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| 7 | Height Front Left | Height Front Left |
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| 8 | Height Front Right | Height Front Right |
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| 9 | Height Rear Left | Height Rear Left |
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| 10 | Height Rear Right | Height Rear Right |
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The other Auro-3D formats are:
| Auro-3D 10.1 | Auro-3D 11.1 | Auro-3D 13.1 | Channel Name |
|---|
| 1 | 1 | 1 | Front Left |
| 2 | 2 | 2 | Front Right |
| 3 | 3 | 3 | Front Centre |
| 4 | 4 | 4 | LFE |
| 5 | 5 | 5 | Surround Left |
| 6 | 6 | 6 | Surround Right |
| - | - | 7 | Back Left |
| - | - | 8 | Back Right |
| 7 | 7 | 9 | Height Front Left |
| 8 | 8 | 10 | Height Front Right |
| 9 | 9 | 11 | Height Surround Left |
| 10 | 10 | 12 | Height Surround Right |
| - | 11 | 13 | Height Front Centre |
| 11 | 12 | 14 | Top Ceiling |
When these formats are mapped for AAX, no attempt is made to map to channels where they correspond. The channels simply appear in the order above. The AAX stem formats actually used are 7.0.4, 7.1.4 and 7.1.6.
The low frequency effect channels are not used.
If you are using the recommended "Inferred" mode, make sure you are using the right plugin for your content, rather than just patching to some of the channels of 13.1. This will give better results.
The plugin is available in the Binaural Surround plugin library.
Controls
Two modes are supported, "Inferred" and "Virtual". Generally, "Inferred" is recommended.
| Mode | Description |
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| 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. |
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| 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. |
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