# Speech synthesis

Hailuo AI Audio leverages advanced speech synthesis technology to convert text into natural and fluent speech. Its main advantages include generating high-quality and expressive speech suitable for various scenarios such as audiobook production and voice broadcasting. The product is positioned as a professional-grade audio synthesis tool that currently offers a limited-time free trial, aiming to provide users with an efficient and convenient voice generation solution.

MaskGCT is an innovative zero-shot text-to-speech (TTS) model that addresses the challenges present in autoregressive and non-autoregressive systems by eliminating the need for explicit alignment information and phone-level duration prediction. MaskGCT employs a two-stage model: the first stage uses text to predict semantic tokens extracted from a speech self-supervised learning (SSL) model; in the second stage, the model predicts acoustic tokens based on these semantic tokens. It follows a masking and prediction learning paradigm, learning to predict masked semantic or acoustic tokens based on given conditions and prompts during training. During inference, the model generates a specified length of tokens in parallel. Experiments show that MaskGCT surpasses the current state-of-the-art zero-shot TTS systems in terms of quality, similarity, and intelligibility.

StreamSpeech is a real-time speech-to-speech translation model based on multi-task learning. By learning translation and synchronization strategies in a unified framework, it effectively identifies the translation timing within streaming voice input, achieving a high-quality real-time communication experience. The model has demonstrated leading performance on the CVSS benchmark and can provide low-latency intermediate results, such as ASR or translation.

AnyGPT is a unified large-scale language model that employs discrete representations for the uniform processing of various modalities, including voice, text, images, and music. AnyGPT can be trained stably without modifying the architecture or training paradigm of existing large-scale language models. It relies entirely on data-level preprocessing, which facilitates the seamless integration of new modalities into the language model, akin to the addition of a new language. We have constructed a text-centric multi-modal dataset for multi-modal alignment pre-training. Utilizing generative models, we have created the first large-scale multi-modal instruction dataset from any modality to any modality. It consists of 108,000 multi-turn dialogue examples with different modalities intertwined, enabling the model to handle combinations of any modal input and output. Experimental results indicate that AnyGPT can facilitate multi-modal dialogues from any modality to any modality and achieve performance comparable to dedicated models across all modalities, demonstrating that discrete representations can be effectively and conveniently used for unifying multiple modalities in language models.

Whisper Speech is a fully open-source text-to-speech model trained by Collabora and Lion on the Juwels supercomputer. It supports multiple languages and various input formats, including Node.js, Python, Elixir, HTTP, Cog, and Docker. The model's strength lies in its efficient speech synthesis and flexible deployment options. Price-wise, Whisper Speech is completely free. It is aimed at providing developers and researchers with a powerful and customizable text-to-speech solution.

StyleTTS 2 is a text-to-speech (TTS) model that utilizes large speech language models (SLMs) for style diffusion and adversarial training, achieving human-level TTS synthesis. It employs a diffusion model to model style as a latent stochastic variable, generating the most appropriate style for the given text without relying on voice references. Furthermore, we utilize large pre-trained SLMs (such as WavLM) as discriminators and incorporate our innovative differentiable duration modeling for end-to-end training, enhancing the naturalness of the synthesized speech. StyleTTS 2 surpasses human recordings on the single-speaker LJSpeech dataset and matches them on the multi-speaker VCTK dataset, garnering recognition from native English-speaking evaluators. Additionally, when trained on the LibriTTS dataset, our model outperforms prior publicly available zero-shot extension models. By demonstrating the potential of style diffusion and adversarial training with large SLMs, this work achieves human-level TTS synthesis on both single and multi-speaker datasets.

IdeaAize is an AI writing assistant based on ChatGPT, providing over 100 intelligent templates to meet various writing needs, including SEO-optimized blog posts and eye-catching social media advertisements. Users can try it for free and enjoy the fast speech-to-text service. IdeaAize also offers advanced speech synthesis tools, utilizing top-tier AI technologies from Google Cloud, Microsoft Azure, and Amazon to achieve exceptional speech synthesis results. For developers, IdeaAize can also function as a reliable code assistant, helping them complete coding tasks, provide suggestions, and optimize the development process.

TTSLabs is an online voice synthesis and speech recognition service, offering high-quality, natural and fluent voice synthesis and accurate and reliable speech recognition. Through simple API calls, users can convert text to real speech and convert speech to text. TTSLabs supports multiple voice styles and multiple languages, featuring fast response and high efficiency. Pricing is flexible and transparent, suitable for both individual developers and enterprise users.

Text-to-speech online is a free tool that can convert text to natural-sounding speech. It offers high-quality and realistic voice effects, supporting multiple languages and voice options. Users simply need to input their text, select the language and voice, and generate customized voice content. This tool is suitable for various scenarios, such as video dubbing, educational assistance, and voice navigation. Both Mac and Windows users can easily use this tool.