Square 母公司 Block 发布语音模型 Dessa，完全用人类语音训练以捕捉情绪
Block's new AI model Dessa was trained entirely on human speech to catch emotions text-based models miss
- 1Block 发布语音模型 Dessa，官方称其为首个完全用人类语音、不含文本数据训练的模型
- 2模型直接处理音频而非先转文字，可实时捕捉情绪、讽刺、笑声和停顿，支持边听边说的全双工交流
- 3模型可在 MacBook Pro M4 Max 上本地运行，训练仅用一台 NVIDIA GB200 NVL72
- 4Dessa 尚未公开，团队先招募 AI 安全研究者测试意外风险；文中提醒声音有情绪不等于有智能
Block 把语音 AI 的切入点放在文本转写会丢掉的情绪信号上，路线有别于主流，但目前仍是未公开的实验项目。
- 影响：对客服、语音助手等依赖语气的场景，多了一条不经文字转写的情绪识别路径；模型可本地运行，对数据敏感行业有参考价值；但模型未开放，短期内没有可直接采用的商业入口。
- 参考：可考虑让语音客服或外呼团队留意其安全测试与开放进展；值得先梳理现有语音方案在情绪、语气识别上的具体短板，作为日后对比评估的清单。
- 依据：情绪识别等能力描述均出自 Block 官方口径，暂无独立验证；文中同时提醒声音自然不等于具备情绪理解或推理能力。
Block, the company behind Square and Cash App, has unveiled an AI speech model called Dessa.
Block says Dessa is the first AI model trained entirely on human speech, with no text data at all, built from scratch. Instead of converting audio to text first, Dessa processes speech directly as audio. That lets it pick up on emotions, sarcasm, laughter, and pauses in real time.
The model supports full-duplex communication, so it can listen and talk at the same time. It runs locally on a MacBook Pro M4 Max and was trained on a single NVIDIA GB200 NVL72. Block says it built Dessa out of curiosity, a desire for better human-AI communication, and safety concerns, since current voice AI ignores emotional cues. Dessa isn't publicly available yet. The team is first looking for AI security researchers to test the model for unexpected risks. Anyone interested can sign up via a form.
Earlier attempts at emotional voice AI haven't stuck
Several teams have tried to build voice AI that sounds emotionally rich. In March 2024, the startup Hume AI launched EVI (Empathic Voice Interface), a voice AI with "emotional intelligence." Kyutai followed in September 2024 with Moshi. LAION's Open Empathic project has been working since late 2023 on training empathetic speech synthesis models using an open-source audio dataset. OpenAI overhauled ChatGPT's "Advanced Voice Mode" in June 2025 and has continued refining it since then, adding better intonation, pausing, and more realistic expressions of empathy and sarcasm.
But sounding emotional isn't the same as being emotional or intelligent, even if it creates that impression. For advanced speech AI, capabilities like reasoning while responding matter more than how natural the voice sounds, because they actually affect the quality of the answer.
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来源：The Decoder：AI News · the-decoder.com