In this short review, we compare the strengths of four popular open-source TTS models, and try and find which performs the best on a standaradized task.

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Large Language Modeling has revolutionized fields like text and speech generation. This review compares four popular open-source Text-to-Speech (TTS) models: Kokoro, SparkTTS, F5-TTS, and Sesame CSM. Kokoro is lightweight and efficient but lacks voice cloning. SparkTTS offers customizable voices but was found to be less effective in practice. F5-TTS excels in quality and voice cloning. Sesame CSM, despite impressive demonstrations, does not match F5 qualitatively. Overall, F5 is recommended as the best TTS model.

Choosing the Best Text-to-Speech Models: F5-TTS, Kokoro, SparkTTS, and Sesame CSM