[BUG]: [NaturalSpeech2] AttributeError: 'JsonHParams' object has no attribute 'diffusion_type'

[cantabile-kwok]

Describe the bug

The official config ns2.json does not have diffusion.diffusion_type attribute. Meanwhile, in models/tts/naturalspeech2/ns2.py, it is required.

How To Reproduce

Steps to reproduce the behavior:

1. Config/File changes: None
2. Run command: bash egs/tts/NaturalSpeech2/run_inference.sh --text "[The text you want to generate]"
3. See error:

   Traceback (most recent call last):
   File "/tools/Amphion/bins/tts/inference.py", line 169, in <module>
   main()
   File "/tools/Amphion/bins/tts/inference.py", line 162, in main
   inferencer = build_inference(args, cfg)
   File "/tools/Amphion/bins/tts/inference.py", line 29, in build_inference
   inference = inference_class(args, cfg)
   File "/tools/Amphion/models/tts/naturalspeech2/ns2_inference.py", line 29, in __init__
   self.model = self.build_model()
   File "/tools/Amphion/models/tts/naturalspeech2/ns2_inference.py", line 37, in build_model
   model = NaturalSpeech2(self.cfg.model)
   File "/tools/Amphion/models/tts/naturalspeech2/ns2.py", line 31, in __init__
   if cfg.diffusion.diffusion_type == "diffusion":
   AttributeError: 'JsonHParams' object has no attribute 'diffusion_type'

Expected behavior

Simply add

"diffusion_type": "diffusion"

into the ns2.json config will solve the problem.

[cantabile-kwok]

Setting config to egs/tts/NaturalSpeech2/exp_config.json solves this error. It was my mistake.