(Solved, but can be useful to someone) Problems getting the project working for the first time
Trying to set up the project for the first time by following the instructions didn't work, some dependencies were incorrect. After messing with them I eventually found a combination that works, so I'm leaving this here for those who may encounter the same problem. I needed to use specific version of the required packages (many of them would have worked in a range of versions, but I just selected specific ones that worked to make my life easier) and also needed python 3.7 due to a package requiring a constant that was removed on python 3.8.
I replaced the contents of the requirements.txt file with: (I just noticed another set of requirements here that seem more generic than mine https://github.com/fatchord/WaveRNN/pull/238/files)
numpy==1.16.2
librosa==0.6.3
scipy==1.5.4
scikit-learn==1.0.2
numba==0.40.1
matplotlib==3.4.3
unidecode
inflect==4.1.1
nltk==3.6.2
llvmlite==0.32.1
Then installed Python 3.7 Like so:
sudo apt update
sudo apt install software-properties-common
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt install python3.7
sudo apt install python3.7-distutils
Finally installed the pip requirements, including the CUDA drivers;
python3.7 -m pip install torch torchvision torchaudio --extra-index-url https://download.pytorch.org/whl/cu113
python3.7 -m pip install -r requirements.txt
And with that, the project works... at least for me.
If this is an actual issue then it would be a documentation issue, but feel free to close it otherwise. Thank you.