O3A Upmixer - 7.1

O3A Upmixer - 7.1

Host Support

Host TypeSupport
AAXYes
VST2Yes

Audio

ChannelsContent
Input87.1 Surround
Output16O3A

Controls

Description

This plugin takes a surround mix prepared for a 7.1 system and converts it to third order ambisonics (O3A).

Channels

The channel ordering used is:

ChannelAAXVST
1Front LeftFront Left
2Front CentreFront Right
3Front RightFront Centre
4Left Surround SideLFE
5Right Surround SideBack Left
6Left Surround RearBack Right
7Right Surround RearSide Left
8LFESide Right

The plugin is available in the O3A Upmixers plugin library.

Controls

Control: Mode

Three modes are supported, "Inferred", "Studio" and "Virtual". Generally, "Inferred" or "Studio" are 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.
StudioThis 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.
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.

Control: LFE Gain

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.