Binaural Surround - Auro-3D 9.1, 10.1, 11.1 and 13.1

Binaural Surround - Auro-3D 9.1

Host Support

Binaural Surround - Auro-3D 9.1

Host TypeSupport
AAXYes, input mapped to 5.1.4
VST2Yes

Binaural Surround - Auro-3D 10.1

Host TypeSupport
AAXYes, input mapped to 7.0.4
VST2Yes

Binaural Surround - Auro-3D 11.1

Host TypeSupport
AAXYes, input mapped to 7.1.4
VST2Yes

Binaural Surround - Auro-3D 13.1

Host TypeSupport
AAXYes, input mapped to 7.1.6
VST2Yes

Audio

Binaural Surround - Auro-3D 9.1

ChannelsContent
Input10Auro-3D 9.1 (mapped to 5.1.4 for AAX)
Output2Binaural Stereo

Binaural Surround - Auro-3D 10.1

ChannelsContent
Input11Auro-3D 10.1 (mapped to 7.0.4 for AAX)
Output2Binaural Stereo

Binaural Surround - Auro-3D 11.1

ChannelsContent
Input12Auro-3D 11.1 (mapped to 7.1.4 for AAX)
Output2Binaural Stereo

Binaural Surround - Auro-3D 13.1

ChannelsContent
Input14Auro-3D 13.1 (AAXCM_GEN14 for AAX)
Output2Binaural Stereo

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.

ChannelAAXVST
1Front LeftFront Left
2Front CentreFront Right
3Front RightFront Centre
4Surround LeftLFE
5Surround RightSurround Left
6LFESurround Right
7Height Front LeftHeight Front Left
8Height Front RightHeight Front Right
9Height Rear LeftHeight Rear Left
10Height Rear RightHeight Rear Right

The other Auro-3D formats are:

Auro-3D 10.1Auro-3D 11.1Auro-3D 13.1Channel 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

Control: Mode

Two modes are supported, "Inferred" and "Virtual". Generally, "Inferred" is recommended.

ModeDescription
InferredThis 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.
VirtualThis 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.