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=== Objective Metrics === Based on evaluation across multiple datasets (LibriSpeech-test-clean, SeedTTS test-zh/en, AIShell-1), IndexTTS2 demonstrates: '''Superior Word Error Rates''': Outperforms baseline models including MaskGCT, F5-TTS, CosyVoice2, and SparkTTS across most test sets '''Strong Speaker Similarity''': Achieves competitive speaker similarity scores while maintaining improved speech clarity '''Emotional Fidelity''': Highest emotion similarity scores among evaluated models
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