Researchers proposed two live streaming speech synthesis evaluation methods, Live-ProsodyJudge (LPJ) and Decoupled-Live-ProsodyJudge (D-LPJ), to assess fine-grained prosody such as emotion, intonation, and energy. LPJ and D-LPJ outperform a single proprietary Large Language Model (LLM) call in evaluation accuracy and demonstrate efficacy in fine-grained TTS preference optimization.