XTTS-V2 Ultimate guide

XTTS-V2 Ultimate guide


XTTS, an advanced voice generation model, represents a significant leap in text-to-speech technology. Its core functionality lies in its ability to clone voices across various languages, a process that is remarkably efficient and user-friendly. Unlike traditional systems that require extensive training data, often involving numerous hours of recorded speech, XTTS simplifies this process dramatically. With just a brief 6-second audio clip, XTTS can accurately capture the nuances of the original voice, including its tone, pitch, and timbre.

This streamlined approach not only makes XTTS highly accessible but also ensures a quicker setup time, making it an ideal solution for a wide range of applications. From creating personalized voice assistants and enhancing accessibility in technology for those with visual impairments to offering innovative tools for the entertainment industry, XTTS opens up new possibilities. Its ability to clone voices accurately with minimal input also presents opportunities for language learning applications, where users can hear translations in a familiar voice, enhancing the learning experience.

Moreover, XTTS's reduced reliance on extensive training data addresses privacy and data collection concerns, offering a more ethical approach to voice generation technology. This efficiency does not compromise the quality of the voice output, as XTTS is designed to deliver clear, natural-sounding speech, capturing the subtle inflections and characteristics of the original voice with remarkable precision. As a result, XTTS stands out as a versatile, efficient, and user-friendly tool in the evolving landscape of text-to-speech technologies.


The XTTS voice generation model boasts a suite of impressive features, enhancing its versatility and applicability across various domains. Here's an expanded overview of its key features:

  1. Extensive Language Support: XTTS supports a broad spectrum of 17 languages, catering to a diverse global audience. This feature enables users to generate speech in multiple languages, making it an invaluable tool for international communication, multilingual applications, and global business solutions.
  2. Efficient Voice Cloning: One of the standout features of XTTS is its ability to clone voices with just a 6-second audio clip. This efficient process ensures high fidelity in voice replication, capturing the unique characteristics of the original voice with minimal input.
  3. Emotion and Style Transfer: In addition to basic voice cloning, XTTS can replicate the emotional tone and style of the original voice. Whether it's a cheerful, serious, or empathetic tone, XTTS can transfer these nuances into the generated speech, enhancing the naturalness and relatability of the output.
  4. Cross-Language Voice Cloning: A remarkable feature of XTTS is its ability to clone voices across different languages. This means that a voice sample in one language can be used to generate speech in another, maintaining the voice's distinct qualities across linguistic boundaries.
  5. Multi-Lingual Speech Generation: Going beyond single-language text-to-speech conversion, XTTS is capable of generating speech in multiple languages within a single session. This is particularly useful for multilingual environments and applications that require switching between languages seamlessly.
  6. High-Quality Audio Output: The model offers a high sampling rate of 24kHz, which results in clear, high-resolution audio output. This superior sound quality ensures that the generated speech is not only intelligible but also pleasant to listen to, closely resembling natural human speech.
  7. Adaptability for Various Use Cases: With these features, XTTS is well-suited for a wide range of applications. It can be employed in creating more engaging and realistic virtual assistants, enhancing user experience in gaming and entertainment, providing accessibility solutions for those with visual or reading impairments, and much more.
  8. Ease of Integration: Designed to be user-friendly, XTTS can be easily integrated into various platforms and applications. Whether for personal, educational, or commercial use, the model's adaptability makes it an attractive option for developers and content creators.

Updates over XTTS-v1

The latest iteration of the XTTS voice generation model, XTTS-v2, brings with it a suite of substantial enhancements and new features that mark a significant improvement over its predecessor, XTTS-v1. These updates not only expand the model's capabilities but also refine its performance. Here's an elaborated overview of the key updates in XTTS-v2:

  1. Expanded Language Support: XTTS-v2 introduces support for two additional languages: Hungarian and Korean. This expansion broadens the model's linguistic reach, making it an even more versatile tool for global users and applications requiring diverse language capabilities.
  2. Advanced Architectural Improvements: Significant architectural enhancements have been implemented, particularly in speaker conditioning. These improvements allow for more accurate and nuanced voice cloning, ensuring that the generated voices are more lifelike and closely match the characteristics of the original speakers.
  3. Enhanced Speaker Reference and Interpolation Capabilities: A notable advancement in XTTS-v2 is the ability to utilize multiple speaker references. This feature enables the creation of more diverse and dynamic speech outputs. Additionally, the model now supports interpolation between speakers, allowing for seamless transitions and blending of different voice characteristics, which can be particularly useful in creating varied speech patterns in narratives or dialogues.
  4. Increased Stability: XTTS-v2 boasts improved stability over its predecessor. This enhancement means fewer errors and glitches in voice generation, leading to a smoother user experience and more reliable performance in various applications.
  5. Superior Prosody and Audio Quality: One of the most significant updates in XTTS-v2 is the marked improvement in prosody and overall audio quality. Prosody, which refers to the rhythm, stress, and intonation of speech, is crucial for natural-sounding voice output. XTTS-v2 delivers more natural and expressive speech, making it almost indistinguishable from human speech. The improved audio quality ensures clarity and a more pleasant listening experience.
  6. Optimized for a Range of Applications: These updates make XTTS-v2 an even more powerful tool for a variety of uses, from enhancing AI-driven customer service interfaces to providing more realistic voices in gaming and virtual reality environments, as well as offering improved tools for accessibility and educational purposes.

Supported Languages

XTTS-v2, the advanced version of the text-to-speech model, now boasts an impressive multilingual capability, supporting a total of 17 languages. This wide range of language support not only enhances its global applicability but also makes it an invaluable tool for diverse applications. The supported languages are:

  1. English (en) - Catering to the most widely spoken language globally, offering versatility in various English dialects.
  2. Spanish (es) - Encompassing a language essential for both European and Latin American markets.
  3. French (fr) - Providing support for one of the most romantic and widely used languages in the world.
  4. German (de) - Addressing the needs of a significant language in Europe, known for its business and academic importance.
  5. Italian (it) - Including this melodious language, popular in arts, music, and culinary fields.
  6. Portuguese (pt) - Covering both European and Brazilian Portuguese, acknowledging its growing global influence.
  7. Polish (pl) - Catering to the Slavic language group with a significant presence in Central Europe.
  8. Turkish (tr) - Encompassing this unique language that bridges Europe and Asia.
  9. Russian (ru) - One of the most spoken languages in the world, crucial for Eurasian communications.
  10. Dutch (nl) - Supporting this language that is key in the Netherlands and parts of the Caribbean.
  11. Czech (cs) - Including this West Slavic language, important in Central Europe.
  12. Arabic (ar) - Offering support for one of the most widely spoken languages in the Middle East and North Africa.
  13. Chinese (zh-cn) - Catering to Mandarin, the most spoken language in the world, essential for Asian markets.
  14. Japanese (ja) - Incorporating this East Asian language, significant both culturally and economically.
  15. Hungarian (hu) - A new addition, bringing in this unique Finno-Ugric language spoken in Central Europe.
  16. Korean (ko) - Another new addition, recognizing the importance of this language in East Asia.
  17. Hindi (hi) - Including the primary language of India, representing a significant portion of the South Asian market.


from TTS.api import TTS
tts = TTS("tts_models/multilingual/multi-dataset/xtts_v2", gpu=True)

# generate speech by cloning a voice using default settings
tts.tts_to_file(text="It took me quite a long time to develop a voice, and now that I have it I'm not going to be silent.",

Using 🐸TTS Command line:

 tts --model_name tts_models/multilingual/multi-dataset/xtts_v2 \
     --text "Bugün okula gitmek istemiyorum." \
     --speaker_wav /path/to/target/speaker.wav \
     --language_idx tr \
     --use_cuda true

Using the model directly:

from TTS.tts.configs.xtts_config import XttsConfig
from TTS.tts.models.xtts import Xtts

config = XttsConfig()
model = Xtts.init_from_config(config)
model.load_checkpoint(config, checkpoint_dir="/path/to/xtts/", eval=True)

outputs = model.synthesize(
    "It took me quite a long time to develop a voice and now that I have it I am not going to be silent.",

In conclusion

In conclusion, XTTS-v2 emerges as a groundbreaking advancement in the realm of text-to-speech technology, setting a new benchmark for voice synthesis. With its impressive array of features, including support for 17 languages, efficient voice cloning with minimal audio input, and the ability to capture emotional tones and styles, XTTS-v2 stands as a versatile and powerful tool. Its integration of Hungarian and Korean expands its global reach, further enhancing its utility in various international contexts.

The architectural enhancements in speaker conditioning and the improved prosody and audio quality highlight XTTS-v2's commitment to delivering a more natural and lifelike speech experience. Whether for business, entertainment, education, or accessibility, XTTS-v2 offers an unmatched level of quality and flexibility, making it an essential asset in today's digital landscape.

As we embrace a future where technology continually shapes our interaction and communication, XTTS-v2 is not just a step but a leap forward. It brings us closer to bridging the gap between human and machine interaction, making digital communication more personal, engaging, and accessible. XTTS-v2 is not just a tool; it's a harbinger of a future where technology speaks in a voice that is unmistakably human.