References:
- https://gist.github.com/mikesmales/67fc6ec36078a94bb62f0f455d4d6a38
- https://www.kaggle.com/pranathichunduru/svm-for-multiclass-classification/code
- https://github.com/mikesmales/Udacity-ML-Capstone/tree/master/Notebooks
- https://medium.com/prathena/the-dummys-guide-to-mfcc-aceab2450fd
- https://github.com/tyiannak/pyAudioAnalysis/wiki/3.-Feature-Extraction
- https://www.analyticsvidhya.com/blog/2019/07/learn-build-first-speech-to-text-model-python/