How human feedback actually steers TTS fine-tuning

How human feedback actually steers TTS fine-tuning Notes on the iteration loop we ran while fine-tuning F5-TTS and StyleTTS2 on a small Northern English corpus. The headline finding is that the listening test isn't optional polish at the end — it's the only measurement that catches the failure modes that matter, and each round of listening produces specific phonetic observations that map to specific engineering decisions. This is a write-up of the methodology, with the concrete examples that for