Block的新AI模型德萨完全接受了人类演讲的培训抓住情感文本模型的失忆
Block)，是Square和Cash App背后的公司，拥有一个名为德萨的AI语音模型发布。
Block 称 Dessa是第一个完全接受过人类演讲培训的AI模型，完全没有文本数据，从零开始构建。 德萨不首先将音频转换为文本，而是直接将语音处理为音频。 这样它就能在情绪，讽刺，取笑，实时地暂停。
该模型支持全双相交流，因此可以同时收听并交谈。 它在当地运行于一款MacBook Pro M4 Max上，并接受了单机NVIDIA GB200 NVL72的训练。 Block 称建造德萨是出于好奇心、对更好的人与AI沟通的渴望以及安全问题，德萨还没有公开团队首先寻找AI安全研究者来测试该模型是否有出乎意料的风险。 任何有兴趣的人都可以通过表格报名。
之前试图表达情感 AI没有卡住
几支队伍试图建立听起来情绪丰富的语音AI. 2024年3月，启动的Hume AI 发布 EVI(英语：Empathic Voice Interface)，一个带有"情感智能"的语音AI. 京泰于2024年9月跟随莫希出道。 LAION的"开放爱心"项目从2023年后期开始使用开源音频数据集来培训爱心语音合成模型。 OpenAI于2025年6月对ChatGPT的"先进语音模式"进行了大修，并自此不断完善，增加了更好的入声，匮乏，更现实地表达同情和讽刺。
但声音情感与情感或智慧并不相同，即使它创造了这种印象。 对于高级语音AI来说，在响应的同时推理等能力比语音听起来多么自然更重要，因为它们实际上影响了答案的质量。
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Block's new AI model Dessa was trained entirely on human speech to catch emotions text-based models miss
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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