陳建成（Chien-Cheng (Jeff) Chen）

There were some typos here, so the migration made the program crash. ``` AttributeError: 'Tensor' object has no attribute 'power' ``` The correct version should be ```python power = spectrogram.abs().pow(2)...

Also, `input_arg` instead of `input_args` . 😭 I have a refactored version. Testing... 🤔