The Quad 4.0 speaker setup which contains four channels.
The Quad 4.0 speaker mode contains four channels:
Channel count is set to 4. You can send different audio to each channel, which can create a more immersive, simple, surround experience. If a device doesn't support this mode, Unity picks a supported mode (often AudioSpeakerMode.Stereo).
This mode is common in fixed installations and museums.
Pros:
- Quad is simple surround for four-speaker setups.
Cons: