Is there a demonstration or a free way to try it without having to pay for a single test or anything out there?
Yes -- you can run inference on HF directly [0]. If you want to hear the demos that Simon Willison recorded, he has a nice blog post about it. [1]
Official demos:
https://huggingface.co/spaces/Qwen/Qwen3-TTS
https://modelscope.cn/studios/Qwen/Qwen3-TTS
You can even do it on your PC. I did it via ComfyUI and this Plugin:
https://github.com/flybirdxx/ComfyUI-Qwen-TTS