Subscriber for audio only without browser

Hi, everyone. I’m a beginner to use openVidu platform.
I have studied tutorials and deploy the server to our cloud. And OpenVidu work properly.

Now, I want to implement audio subscriber on Raspberry Pi without browser.
I found some package of python (pyopenvidu) for REST API but I didn’t find any information to connect the audio stream in python.

Can you guys give me some clue how to implement of my task, for example, using gstreamer or java something like that.
It would be great helpful for me.

Thank you.