
PhD @kyutai_labs and @Ircam. Deep Learning and music
Paris, France
Joined February 2021
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Simon Rouard retweeted
A new frontier for on-device speech.
We're open-sourcing Phonon, a suite of TTS models under 50m parameters, setting a new standard for naturalness and accuracy across languages, with the broadest inference support to date.
Phonon-31m is available under Apache 2.0.
gradium.ai/phonon🧵
Congrats to @Manu__Orsini who managed to build TTS models down to 1.9M parameters with the CALM framework! Truly a wizard
Simon Rouard retweeted
If you're looking for a weekend project, how about training your own text-to-speech model from scratch on your own GPU, and then running it on any device's CPU?
We just open-sourced the entire Pocket TTS training stack: data pipeline, recipes, and evals.
It learns pretty damn fast:
~15k steps: babbling starts turning into words
~50k steps: it reads anything you type (WER under 1%)
~200k steps: the voice stops sounding synthetic
On a beefy consumer GPU, that's a week of training. On eight H100s: 10-20 hours. A TTS training run will cost you less than $200 if you rent your hardware, and an order of magnitude less if you just pay for power.
Some things we'd love to see people try:
- Train it in your own language (a few hundred hours of speech gets you surprisingly far).
- Add new features to Pocket TTS (Emotion tags? Make it sing?).
- Beat us at our own game: make it faster and smaller.
Show us what you build! We'll highlight the best models and new languages for the whole community to enjoy. Pocket TTS has already found many use cases, from reading for people with visual impairments to making NPCs in video games talk, and we're sure there's much more to do with it!
Here's an example of a Czech Pocket TTS. Try just asking your favorite agent to find data and apply the method, and you can have your own.
Get started: github.com/kyutai-labs/pocke…
Super cool that people are building on top of MuScriptor!
楽譜がない曲でも、音源からバンドスコア(TAB譜)を作れるサービスを作りました。
youtabs.com/
楽曲を楽器ごとに採譜し、BPM・キー・コード進行・強弱やピッチベンドなどを解析の上、MIDI/TAB譜/コード譜を作成可能です。
音源はサーバにはアップされず、ブラウザ上ですべて処理されます。
Simon Rouard retweeted
Our audio-to-MIDI model, MuScriptor, now also detects tempo! You can directly drag-and-drop the MIDI into a DAW and it just works, without you having to tempo-match manually. Have fun!
A fun application of MuScriptor! Our joint work between @MireloAI and @kyutai_labs
Very proud to see our last work about Music Transcription released in open source. Go try it at muscriptor.kyutai.org
Inference code: github.com/muscriptor/muscri…
Paper: arxiv.org/abs/2607.08168v1
We're releasing MuScriptor, the best open model for multi-instrument transcription to date, created in collaboration with @MireloAI.
Give it a recording in any genre: pop, classical, metal, jazz, whatever, and it transcribes the individual instruments into MIDI. Link in 🧵
Simon Rouard retweeted
We're releasing MuScriptor, the best open model for multi-instrument transcription to date, created in collaboration with @MireloAI.
Give it a recording in any genre: pop, classical, metal, jazz, whatever, and it transcribes the individual instruments into MIDI. Link in 🧵
Simon Rouard retweeted
Simon Rouard, Michael Krause, Axel Roebel, Carl-Johann Simon-Gabriel, Alexandre Défossez, "MuScriptor: An Open Model for Multi-Instrument Music Transcription" arxiv.org/abs/2607.08168
Today at 10:30 at @iclr_conf I’ll be presenting CALM (Continuous Audio Language Models), the architecture behind Pocket TTS, @kyutai_labs’s 100M params TTS that runs on CPU.
Come chat with me if you want to build an audio LM without tokens
Paper: openreview.net/pdf?id=MFrJ3N…
Super happy that our work on Continuous Audio Language Models (arxiv.org/abs/2509.06926) led us to build an outstanding 100M TTS with voice cloning ability that runs on any laptop CPU.
Simon Rouard retweeted
Gradium is out of stealth to solve voice. We raised $70M and after only 3 months we’re releasing our transcription and synthesis products to power the next generation of voice AI.
Simon Rouard retweeted
1/2 We’re releasing an in-depth tutorial on neural audio codecs, the secret sauce that makes it possible for audio LLMs to not sound like a horror movie:
Simon Rouard retweeted
Rouard Simon, Orsini Manu, Roebel Axel, Zeghidour Neil, D\'efossez Alexandre, "Continuous Audio Language Models," arxiv.org/abs/2509.06926
Simon Rouard retweeted
Kyutai Speech-To-Text is now open-source! It’s streaming, supports batched inference, and runs blazingly fast: perfect for interactive applications.
Check out the details here: kyutai.org/next/stt
Simon Rouard retweeted
Talk to unmute.sh 🔊, the most modular voice AI around. Empower any text LLM with voice, instantly, by wrapping it with our new speech-to-text and text-to-speech. Any personality, any voice. Interruptible, smart turn-taking. We’ll open-source everything within the next few weeks.
Simon Rouard retweeted
Meet Hibiki, our simultaneous speech-to-speech translation model, currently supporting 🇫🇷➡️🇬🇧.
Hibiki produces spoken and text translations of the input speech in real-time, while preserving the speaker’s voice and optimally adapting its pace based on the semantic content of the source speech.
Based on objective and human evaluations, Hibiki outperforms previous systems for quality, naturalness and speaker similarity and approaches human interpreters. 🧵
Simon Rouard retweeted
``MusicGen-Stem: Multi-stem music generation and edition through autoregressive modeling,'' Simon Rouard, Robin San Roman, Yossi Adi, Axel Roebel, ift.tt/Ldh3kU1
Simon Rouard retweeted
Meet Helium-1 preview, our 2B multi-lingual LLM, targeting edge and mobile devices, released under a CC-BY license. Start building with it today!
huggingface.co/kyutai/helium…










