Block builds Dessa voice AI from human audio alone on a single Nvidia rack

Jack Dorsey’s Block trained its new voice model, Dessa, on human speech only, not on any text or any pre-trained models. Block says that the finished model can be run locally on a MacBook Pro M4 Max or better. The lab trained it on a single rack of Nvidia servers. Block says Dessa is the first AI it knows of that can carry on a lifelike live conversation and has been trained only on human speech. The tiny research lab behind it reports directly to Dorsey. Full-duplex model talks with OpenAI’s GPT-Live-1 in unsteered demos A lot of voice assistants take what people say, turn it into text, run it through a language model, and then turn the text back into speech.

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