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Behavior of the Channel Router Bus's Child Busses

Child Mixing Bus

If the child bus is a mixing bus, it will mix before going to the parent bus with the mixer plug-in attached. This bus can be set to target specific channels by setting the Channel property of the inherited Wwise Channel Router plug-in.

For example, if you have a sound with Listener Relative Routing enabled outputting into a 7.1 bus, positioning and mixing into the 7.1 bus will be applied first then the result will be sent to the target channel of the parent channel routing bus.

[Warning] Warning
When mixing the channels, the Channel Router will reorder them so as to follow the standard surround sound channel ordering. Having sequential stages of channel routing should be avoided because it would apply the channel reordering twice.

Child Non-Mixing Bus

Sounds routed into a non-mixing bus will be directly routed into their target channels. This is equivalent to routing sounds directly into the bus with the Channel Router plug-in attached. For non-mixing busses, the Channel property will appear in the attachment properties of the sound routed to this bus (in the Mixer Plug-in tab of the Sound Property Editor) instead of in the Property Editor of the bus. This property can be set to target specific channels for a sound.

Here is an example of configuration for this use case:

Master-Mixer Hierarchy:

  • Master Audio Bus (Channel Configuration: Anonymous 16 / With a Wwise Channel Router Mixer Plug-in attached)

    • Audio Bus Non-Mixing (Channel Configuration: Parent / Wwise Channel Router is automatically inherited but the Channel property is on the sound, not on this Bus)

Actor-Mixer Hierarchy:

  • Sound (Output Bus: Audio Bus Non-Mixing, Wwise Channel Router Property can be set in the Mixer Plug-in tab or with an RTPC)

[Note] Note

You can have mixing and non-mixing busses at the same time under the bus with the Channel Router attached. This means it's possible to control output channels for some busses from the Channel property while controlling the output channels of sounds on other non-mixing busses at runtime using an RTPC.

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