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Kani TTS 2

Default

Standard English Neutral Kani TTS 2

Default is a neutral AI voice powered by the Kani TTS 2 text-to-speech model. This free-tier voice speaks English and delivers high-quality speech synthesis. With near-instant generation speed and a quality rating of 4/5, Default is well-suited for fast generation, low-resource environments, quick previews. The Kani TTS 2 engine is developed by NineNineSix under the Apache 2.0 license, making it safe for commercial use. Key capabilities include: 3gb vram, ultra-fast, voice cloning, lightweight, nanocodec. The Kani TTS 2 model also supports voice cloning — upload a short audio sample to create a custom voice that retains the same quality characteristics.

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Kani TTS 2Model Information

Model Kani TTS 2
Developer NineNineSix
Quality
Speed Fast
License Apache 2.0
Cloning Supported
Tier Standard (2x characters)
Parameters 400M
Architecture LFM2 + NanoCodec
Training Data 10000 hours
Year 2026

Best Use Cases for Default

Recommended applications based on this voice's characteristics

Audiobooks & Narration

Use Default to narrate long-form content with natural prosody and expression.

Video Voiceovers

Add professional narration to YouTube videos, ads, and social media content.

Apps & Accessibility

Fast generation makes this voice ideal for real-time apps, screen readers, and accessibility tools.

Custom Brand Voice

Clone this voice style with your own audio to create a unique branded TTS voice.

Frequently Asked Questions

Kani-TTS-2 by NineNineSix is an ultra-lightweight 400M parameter model built on LiquidAI LFM2 backbone with Nvidia NanoCodec. It runs in just 3GB VRAM and achieves 10 seconds of speech in ~2 seconds (RTF 0.2). Supports zero-shot voice cloning via speaker embeddings.

Kani TTS 2 was developed by NineNineSix and is released under the Apache 2.0 license, which permits commercial use of generated audio.

Kani TTS 2 supports 3 languages: English, Portuguese, Spanish.

Kani TTS 2 is in the Free tier — free — no credits required. You can preview any Kani TTS 2 voice for free before generating full audio.

Kani TTS 2 has very fast generation speed. It runs in near real-time, making it suitable for streaming and interactive applications.

Kani TTS 2 is rated 4/5 for audio quality on TTS.ai. It produces high-quality, natural-sounding speech.

Yes, Kani TTS 2 supports zero-shot voice cloning. Upload 5-30 seconds of reference audio to create a custom voice.

Yes, Kani TTS 2 is specifically recommended for fast generation, low-resource environments, quick previews. Its 3gb vram, ultra-fast, voice cloning capabilities make it an excellent choice for this use case.

Yes, Kani TTS 2 is licensed under Apache 2.0, which allows commercial use. Audio generated with Kani TTS 2 voices can be used in videos, podcasts, apps, games, and any other commercial project.

Yes, all voices on TTS.ai use commercially-licensed open-source models (MIT, Apache 2.0). The generated audio is yours to use in videos, podcasts, apps, games, and any other commercial application.

Send a POST request to /api/v1/tts/ with the model name and voice ID. See our API Documentation page for code examples in Python, JavaScript, Go, and cURL.

Yes, click the play button on this page to hear a sample. You can also type custom text on the Text to Speech page and generate a free preview with any voice.

Try Default Now

Type any text and hear it spoken by Default. Free to use.

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