Audio8 TTS

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Speech model

Audio8 TTS Preview Runs on your device

Open-source 0.6B DualAR model with 44.1 kHz output. Generation happens locally; your text never leaves this page.

Audio8 follows the written text; it has no hidden language-ID input. This selection sets writing guidance and accessibility metadata.

0.7

Lower values sound steadier, higher ones add variation. 0.7 matches the official default.

Model weights: Audio8/Audio8-TTS-Preview-0.6B-ONNX-INT4, Apache 2.0. Weights stream from the Hugging Face CDN straight into your browser cache.
The quick answer

Audio8 TTS is an open-source 0.6B speech model with 11 recommended languages and 44.1 kHz output. This page caches about 572 MiB of model files, tries native WebGPU before a threaded CPU fallback, and keeps your text and the generated audio on your device.

Four steps

How to use Audio8 TTS in your browser

  1. 01

    Open this page on a desktop

    The tool loads straight in the browser. No account, no install, no API key. Skip this on phones and tablets; the model needs PC or Mac hardware.

  2. 02

    Let the weights download once

    Clicking Load model on this device pulls about 572 MiB of INT4 model files from the Hugging Face CDN. Your browser caches them, so later visits skip the network download.

  3. 03

    Choose a language and voice

    Select one of the 11 recommended languages. Audio8 follows the writing itself rather than a language ID, so paste text in the language you want to hear.

  4. 04

    Listen and download

    Wait for the smooth final result, or enable the optional live preview for provisional chunks. Save a lossless 44.1 kHz WAV or convert it to MP3 inside the browser.

Best practices

Getting good output from the Audio8 preview

Small habits separate a demo-grade clip from something you would publish. These six matter most with an autoregressive model.

  • 01

    Keep requests short while you learn the model

    The upstream runtime recommends roughly 150 characters for best quality. Generate one sentence at a time, then stitch the WAVs for longer scripts.

  • 02

    Write punctuation the way you want it spoken

    Commas buy a short beat, periods a longer one, ellipses a held pause. The DualAR model reads these as delivery cues, so a line that lands flat often just needs a comma.

  • 03

    Drop creativity if samples drift

    The creativity slider sets sampling temperature. At 0.7 you get the official default balance. If a long word warbles or a syllable repeats, pull it toward 0.5 and generate again.

  • 04

    Match the language, handle the tricky bits

    Acronyms sound better with dots between the letters, like N.A.S.A. Spell out unusual names phonetically. Test the difficult word on its own, tweak the spelling, then run the whole passage.

  • 05

    Chrome or Edge can use the GPU

    Current Chrome and Edge are tested for native WebGPU with FP16 support. If the three model probes fail, the tool automatically rebuilds using the threaded WebAssembly CPU backend.

  • 06

    Grab the WAV, convert later

    The WAV keeps the full 44.1 kHz signal for editors and DAWs. Only use the MP3 button when file size matters more than headroom.

Honest comparison

Audio8 TTS vs Kokoro

We run Kokoro across the rest of this site, so here is the honest internal comparison: where each model wins, and why both earn a spot.

Where it runs

FreeTextoSpeech

Native WebGPU on compatible Chrome/Edge devices, with threaded CPU/WebAssembly fallback.

Kokoro (our main tool)

In-browser engine too, roughly 300 MB lighter to download.

Output quality

FreeTextoSpeech

44.1 kHz neural codec output with expressive prosody.

Kokoro (our main tool)

24 kHz output, very natural narration for its size.

Language coverage

FreeTextoSpeech

11 languages including Korean, German, Dutch, Polish, and Cantonese.

Kokoro (our main tool)

9 languages focused on English, European languages, Hindi, Japanese, Mandarin, and Portuguese.

Speed on a typical laptop

FreeTextoSpeech

Heavier: an AR model generating about 21.5 frames per second of audio.

Kokoro (our main tool)

Much faster, close to real time on most machines.

First-use download

FreeTextoSpeech

About 572 MiB, plus an optional 396 MiB voice encoder.

Kokoro (our main tool)

A few hundred MB at full precision.

Maturity

FreeTextoSpeech

Preview release with limited dialect coverage.

Kokoro (our main tool)

Stable v1.0 model we serve across the whole site.

Both models are Apache 2.0 open source. Figures refer to current public releases: Audio8-TTS-Preview-0.6b and Kokoro-82M-v1.0.

FAQ

Frequently asked questions

01

What is Audio8 TTS?

Audio8 TTS is an open-source text-to-speech model family from the Audio8 team. The current preview, Audio8-TTS-Preview-0.6b, packs 601 million parameters into a DualAR architecture inspired by Fish Audio S2 Pro. It speaks 11 languages, and both code and weights ship under Apache 2.0.
02

Is Audio8-TTS-Preview-0.6b free to use?

Yes. The model is released under Apache 2.0, allowing commercial use without royalties. This page runs it on your own device, so there is no usage quota from us either. Check the upstream NOTICE file in the official repository for attribution details.
03

Does my text get uploaded anywhere?

No. Generation happens inside your browser using WebGPU or WebAssembly. The Audio8 engine fetches its runtime and model files from the Hugging Face and jsDelivr CDNs. Your text and the generated audio never touch our servers; the site may still send ordinary usage telemetry without that content.
04

Why is the first generation slow?

Two reasons. First, the browser downloads about 572 MiB of synthesis files once. Second, this autoregressive model performs one Slow AR call and ten Fast AR calls for every audio frame. Compatible Chrome and Edge devices try native WebGPU; other systems use the threaded CPU fallback.
05

Which languages does Audio8 TTS support?

The preview targets eleven languages: English, Spanish, French, German, Italian, Dutch, Polish, Japanese, Korean, Chinese, and Cantonese. The team states that broader multilingual coverage and Chinese dialect support are planned for future releases.
06

Audio8 or Kokoro, which should I use?

Use Kokoro, our main tool, when you want fast generation, 54 ready voices, phone support, and proven stability. Pick Audio8 when you want to try the newest open model, need 44.1 kHz output, or work in German, Korean, Dutch, Polish, or Cantonese. Many people keep both bookmarked.
07

Does it work offline?

Model weights and voice profiles are cached locally, so repeat generations do not re-download them. A complete offline reload still depends on your browser retaining this page and its runtime modules; clearing site data removes the cache and local voices.

Still wondering? Get in touch →

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