about preprocess data

[yihaoyao402]

hi, thanks for your work. but i met a problem in diffsinger and diffgan both
Traceback (most recent call last):
File "F:\DiffSinger-main\preprocess.py", line 19, in
preprocessor.build_from_path()
File "F:\DiffSinger-main\preprocessor\preprocessor.py", line 113, in build_from_path
if len(f0) > 0:
UnboundLocalError: local variable 'f0' referenced before assignment
it bothers me a lot, thanks for your help

[yihaoyao402]

@keonlee9420