Prepare spectrograms from audio for training a Riffusion model

1. Run the following command: pip install pydub
2. Download and install the following repo: https://github.com/riffusion/riffusion

1. Place a any number of .wavs in the "input" folder
2. Replace the text in "keyword.txt" with your keyword
3. Run the python script: python prep.py
4. Output spectrograms will appear in the "output" folder