# Hugging Face releases Phonon TTS with on-device speech and open weights

Digest AI · Hardware & Compute · published 2026-11-05T00:00:00Z · updated 2026-11-05T10:52:04Z

Canonical: https://digestai.news/story/hugging-face-releases-phonon-tts-with-on-device-speech-and-open-weight

## Summary

Hugging Face launched **Phonon**, a text-to-speech model designed to run entirely on a user’s device without cloud dependency. The release includes two models: **Phonon 31m** (Apache 2.0 license, supports English) and **Phonon 40m** (CC BY-NC, supports five languages: English, French, German, Spanish, and Portuguese). Both are under **75 MB** and feature **100+ built-in voices**, with custom voice cloning via **Gradium Studio**. Phonon handles complex inputs like phone numbers and dates, and it supports devices from phones to single-board computers and browsers.

The model tops benchmarks on **intelligibility** (first in German/Spanish, top 3 across languages) and **speed** (fastest CPU streaming). Hugging Face built a new inference framework (**ptts**) for cross-device compatibility, including support for **CPU, GPU, and NPU** backends. Phonon integrates with **Hugging Face Transformers** (v5.21+) and has been downloaded **200,000+ times** in its first two weeks. The company also introduced the **Open TTS Leaderboard**, a new tool for comparing open TTS models across 23 languages.

## Key points

- Phonon runs offline on devices like phones, laptops, and browsers with no cloud dependency
- Two models released: **Phonon 31m** (English, Apache 2.0) and **Phonon 40m** (5 languages, CC BY-NC)
- Tops benchmarks for intelligibility and speed, supports 100+ voices and custom cloning

## Why it matters

Phonon shifts TTS from cloud-dependent to on-device, enabling privacy-focused speech synthesis without latency or connectivity costs. Its open weights and modular design accelerate adoption for developers and commercial projects.

## Sources

1. [A Closer Look at Phonon TTS. Launching High-Quality On-Device Speech That Tops the Benchmarks.](https://huggingface.co/blog/phonon-tts) (Hugging Face, 2026-11-05, primary source)
2. [Gradium’s On-Device Phonon TTS Passes 200,000 Downloads in Two Weeks](https://unite.ai/gradiums-on-device-phonon-tts-passes-200-000-downloads-in-two-weeks) (Unite.AI, 2026-11-05)

Part of the developing story: [Gradium Phonon TTS Open Source Release](https://digestai.news/thread/gradium-open-sources-phonon-31m-on-device-tts-model-under-apache-2-0) (2 stories)

## Cite

Digest AI, "Hugging Face releases Phonon TTS with on-device speech and open weights", 5 November 2026, https://digestai.news/story/hugging-face-releases-phonon-tts-with-on-device-speech-and-open-weight

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