Block’s New AI Dessa Can Hear You Cry. Nobody Can Read What It Said.

Last week, Block showed Dessa: a voice AI that laughs, interrupts and hears when you're upset. It was trained only on human speech. No text. No LLM. No transcript. That last part breaks how voice AI has been tested for a decade. You can't read what it said. In one demo it called someone "Ronaldo." It sounded right. It was wrong. And it runs offline on a laptop. No logs. No second chance. So you test it before it talks to anyone. TestMu AI Agent Testing calls your voice agent the way your customers do: 200+ voices, 50+ accents, real noise. It scores the call itself, runs the same tests on every release, and gives you a Green, Yellow or Red go-live verdict. ▶ Test your voice agent free: https://www.testmuai.com/voice-agent-testing/ 00:00 An AI with no transcript 00:20 The "Ronaldo" problem 00:29 Offline, no logs 00:38 Test it before it talks 00:54 The go-live verdict #VoiceAI #AITesting #AgentTesting