# Meituan LongCat Team Launches Speech Synthesis Model LongCat-AudioDiT

- Category: Flash (快讯)
- Published: 2026-04-01T11:56:00.000Z
- Source date: 2026-04-01
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The Meituan LongCat team has released the LongCat-AudioDiT model, achieving state-of-the-art performance in zero-shot voice cloning. The model performs diffusion generation directly in the waveform latent space, discarding traditional Mel-spectrogram intermediate representations to prevent information loss. It also introduces Dual Constraint Alignment and Adaptive Projection Guidance techniques to address training-inference mismatches and mitigate oversaturation.

## At a glance

- Direct diffusion generation in waveform latent space avoids Mel-spectrogram information loss
- Uses DCA and APG techniques to resolve training-inference mismatches and oversaturation

## The update

The Meituan LongCat team has officially launched LongCat-AudioDiT, a speech synthesis model that achieves state-of-the-art performance in zero-shot voice cloning. Unlike traditional approaches, LongCat-AudioDiT discards Mel-spectrograms as intermediate representations and performs diffusion generation directly in the waveform latent space, effectively preventing information loss. To ensure generation quality, the team introduced two key technologies: Dual Constraint Alignment (DCA) and Adaptive Projection Guidance (APG). These innovations aim to fix mismatches between training and inference stages while mitigating oversaturation in generated audio, significantly improving the naturalness and stability of speech synthesis.

## Sources

- [龙猫LongCat](https://mp.weixin.qq.com/s/YaU20XkTSSYXZ4YTJ22PWg) (2026-04-01)

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