I guess it's similar to what you mentioned with bark, the more training and custom adaptation that can be done, the less metallic it will sound. I tested with r

I guess it's similar to what you mentioned with bark, the more training and custom adaptation that can be done, the less metallic it will sound. I tested with random voices until i got one that was similar, the existing Bella voice is almost as your sample but has very little metallic s-s.