How to get gpt-4o-realtime-preview to be more emotive?

I want to use the API to generate snippets that I can use for voice acting (as dialogue for AI movies). I’ve tried a bunch of different things in the instructions of the response (be more emotional, change your tone a lot etc). However, I keep getting back pretty monotone dialogue. I haven’t yet gotten anything that sounds like the demo videos from OpenAI. Anyone have any tips or advice?

@AndrijaR
Do you have a source for this?

My bad, I was mistaken. I’m assuming since it just released they aren’t giving full features with the emotion of the voice. That or it is doing STT and sending text but output is audio since it isn’t capturing emotion in voice that I tested with.