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Zonos - ZyphraAI's open-source multilingual TTS model

Zonos is a high-fidelity text-to-speech (TTS) model introduced by Zyphra. Zonos comprises two models: a Transformer model with 1.6 billion parameters and a hybrid SSM model, both open-source under the Apache 2.0 license. Zonos...

What is Zonos?

Zonos is a high-fidelity text-to-speech (TTS) model from Zyphra. Zonos comprises two models: a Transformer model with 1.6 billion parameters and a hybrid SSM model, both open-source under the Apache 2.0 license. Zonos generates natural, highly expressive speech based on text prompts and speaker embeddings, supports speech cloning, and allows adjustment of parameters such as speech rate, pitch, and emotion. The output sampling rate is 44kHz. The model is trained on approximately 200,000 hours of multilingual speech data, primarily supporting English with limited support for other languages. Zonos offers an optimized inference engine for rapid speech generation, making it suitable for real-time applications.

Zonos's main functions

  • Zero-sample TTS and speech cloningInput text and a 10-30 second speaker sample, and it can generate high-quality TTS output.
  • Audio prefix inputBased on adding text and audio prefixes, it can more accurately match the speaker's voice and achieve behaviors that are difficult to replicate through speaker embedding, such as whispering.
  • Multilingual supportSupports English, Japanese, Chinese, French, and German.
  • Audio quality and emotional controlIt supports fine-grained control over speech rate, pitch, maximum frequency, audio quality, and various emotions.

Zonos's technical principles

  • Text preprocessingBased on the eSpeak tool, text normalization and phoneme conversion are performed to convert the input text into a phoneme sequence.
  • Feature predictionPredict DAC (Discrete Audio Codec) tags using Transformer or Hybrid Backbone.
  • Speech generationBased on the predicted DAC tags, high-quality speech output is generated by decoding with an autoencoder.

Zonos project address

Zonos application scenarios

  •  Audiobooks and Online EducationIt converts text content into natural and fluent speech, providing high-quality voice narration for audiobooks and online courses.
  • Virtual assistants and customer serviceIn virtual assistant and customer service systems, natural voice interactions are generated, providing a more human-like user experience.
  • Multimedia content creationGenerate high-quality narration and voice-over in video production, animation, and advertising.
  • Accessibility technologyProvides audio reading services for visually impaired individuals, converting web pages, documents, and books into audio to help them better access information.
  • Games and Interactive EntertainmentIn games and interactive entertainment applications, generate character dialogue and narration to enhance the immersive experience.
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