text: Title: Noise, wheezing in the output audio
  Body: Hi! Almost all the output audio that I received had a low voice frequency, and noise could occur in the middle of the voice. On many synthesized audio, the voice had a "hoarseness".
   
  As the source audio, I tried many different voices, many of them with a high-pitched voice. 
  What could be the problem? Is this an inaccuracy of the model or my mistake? 
  
  Thank you in advance for your help!
  
  