输出的音频的音高出现问题

https://user-images.githubusercontent.com/64080472/133906398-f3ccdda6-0e56-4ce9-9081-7522882a3bb5.mp4

按照教程的步骤一步步完成了，也根据issue里的内容对symbols.py文件进行了更改，但输出音频的音高却像是方言一样奇怪，如上是输出时的设置。

Start by reviewing symbols.py and the tutorial steps, then compare the output settings shown in the attached video and image with the expected configuration. Reproduce the pitch problem and determine whether the symbol changes or settings are involved; done means generated speech has the expected pitch.

Written by the indexing model from the issue text.