There is training instructions in the repository. The training scripts appear to be using some pretty standard ML libraries (I'm seeing keras and mentions of tensorflow), so I imagine that the requirements are the same as those.

I don't feel I'm qualified to elaborate on this specifically, again, I'm no ML person. For more info look here: https://github.com/xiph/rnnoise/tree/master/training https://github.com/xiph/rnnoise/blob/master/TRAINING-README