In general you can perform actions in the dialogue tree using the Task Action node. If you want to run multiple actions together, you can add multiple actions in the Task Action node and set them to Run In Parallel.
Thus, for what you are after, I would recommend using Task Action nodes INSTEAD of the default “Say” nodes, and add the LipSync action + the Say action together and set them to Run In Parallel. As such, both actions will run together simultanously.
Please let me know if that works for you.
Thanks!
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