Emotion-embedding cosine similarity (EMO-SIM) fails to track emotion under speaker or wording changes and misaligns with human perception, so it is unreliable for evaluating expressive speech generation.
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The False Resonance: A Critical Examination of Emotion Embedding Similarity for Speech Generation Evaluation
Emotion-embedding cosine similarity (EMO-SIM) fails to track emotion under speaker or wording changes and misaligns with human perception, so it is unreliable for evaluating expressive speech generation.