Yes, you can. I was just testing it. I made a "My Custom Voices" tab, and recorded a small sample of my own voice or upload a sample of w/e voice. Then you can use it. I am in the process of training a model of my voice too to see how it handles it using the 1.7b

Works surprisingly good with a 4090. I will also try it on 5090. This is the best one I have seen so far. NGL. 11Labs is cooked lol.