O1A Decoder - 7.1.4

O1A Decoder - 7.1.4

Host Support

Host TypeSupport
AAXNo
VST2Yes

Audio

ChannelsContent
Input4O1A
Output127.1.4 Surround

Controls

Description

This plugin takes a first order ambisonics (O1A) mix and decodes it to 7.1.4.

Please note that although 7.1.4 is not an uncommon speaker layout for Dolby Atmos playback, the actual mastering and delivery format used is often 7.1.2.

Channels

The channel ordering used is:

ChannelVST
1Front Left
2Front Right
3Front Centre
4LFE
5Left Surround Rear
6Right Surround Rear
7Left Surround Side
8Right Surround Side
9Left Top Front
10Right Top Front
11Left Top Rear
12Right Top Rear

The plugin is available in the O1A Decoding plugin library.

Controls

Control: Method

Three methods are supported, "Basic", "Reconstruction" and "Tinted Reconstruction". Generally, "Basic" is recommended except where the speaker rig to be used for playback is known and has been set up accurately.

MethodDescription
BasicThis method produces a resilient decoding which should play well on a range of speaker systems including large venues.
ReconstructionThis method controls the soundfield at the centre of the listening space to produce a clearer spatial image. It relies on the speaker layout being set up accurately.
Tinted ReconstructionThis variant of the Reconstruction method performs HRTF-based tinting on the audio stream to strengthen the spatial image. Again, it relies on the speaker layout being set up accurately.

Control: LFE Crossover

This determines if any audio is sent to the LFE channel. It may be set to "Off" and this is recommended. If enabled, audio is extracted from the main mix into the LFE channel using the indicated crossover frequency (between 1 and 200Hz).

Control: LFE Gain

If the LFE gain is active, this gain is applied to it. Some export formats may need this set to -10dB to take into account a +10dB gain applied during playback.