I've decided to take the R requests as a handicap challenge. This is still a work in progress, but meanwhile you are welcome to keep an eye on my git repo.

1. My intention here is to start off with just EDA in R on a few sample files. Then, you can run that EDA on the test and training files if you wish.
2. After that, I might do a full starter code in R segment as I have most of the information around this gathered already.
3. When my code is finalised, I will publish a blog post with more information relating to audio signal processing and R.

This is a pre-emptive strike in case anyone wants to start off in R already. I will supply some blog posts once I have finalised my code, but what you can already see in the code segment is how to display the waveform, and how to obtain the spectrogram.

Hope this helps!