How to change audio volume through Audio2Face RestAPI?

Omniverse Apps Audio2Face
1

Hi,

I’m using the Audio2Face 2023.1.1 headless program and RestAPI for a project. I’m using Stream Live Link between A2F and Unreal Engine 5. When I am playing an audio through an audio stream player, the audio is played out of the Audio2Face program. I would like to access the preference settings using the RestAPI to turn down the audio volume from playing through Audio2Face, so I can only play the audio through the Unreal Engine. Is there a RestAPI command for doing that?

2

Also, it seemed like changing the volume in the preference panel in the Audio2Face UI didn’t actually adjust the volume that is being played.

3

I’m using the provided test_client.py in \audio2face2023.1.1\exts\omni.audio2face.player\omni\audio2face\player\scripts\streaming_server for Streaming Audio Player.

4

Unfortunately, Audio2Face RestAPI doesn’t support changing audio volume at the moment. Thanks for bringing this to our attention. We will internally discuss the possibility of adding this.

5

I see. Thanks for the answer! This might not be completely related to Audio2Face, but I’m trying to use the Audio Port in the Unreal Engine 5 NVIDIA Omniverse Live Link Source (show in Audio2Face to UE Live Link Plugin — audio2face latest documentation). What is being outputted to this port and how can I play the audio from this port through UE5?

6

  • You could use Audio2Face’s livelink extension as a starting point and reference for creating the custom streaming extension. It can be found in a folder similar to this: C:\Users\<UserName>\AppData\Local\ov\pkg\prod-audio2face-2023.1.1\exts\omni.avatar.livelink

  • You could also use A2F->UE livelink plugin as a reference for receiving blendShape weights. It can be found in a folder simliar to this: C:\Users\<UserName>\AppData\Local\ov\pkg\prod-audio2face-2023.1.1\ue-plugins\audio2face-ue-plugins