Stage 2 breaks at bad quality voice.

[Vadim2S]

I am have bunch of real voice file. Some of it has real bad quality. At stage 2, utils.py, convert_continuos_f0(...), start_f0 = f0[f0 != 0][0] I am get exception "index 0 is out of bounds for axis 0 with size 0".

There may be good do not break process and\or check quality and drop files automatically.