Apply real-time voice conversion to the user's voice

[philpax]

Based on my preliminary research, machine learning research is at the stage where real-time voice conversion is possible, but not easy. The largest proof-of-concept in this area is realtime-yukarin, which appears to work surprisingly well.

Open questions:

• What's the current state of the art now?
• How easy is it to integrate?
• Can we produce the full range of voices you'd expect from FFXIV characters?
• Can the proposed solution handle gender-bending?
• What is the latency on conversion?