Dia TTS – open-source multi-speaker dialogue generator
Diatts is a weblog on open-source speech synthesis: dialogue timing, prosody, corpus preparation, model documentation and listening-test evaluation.
Dia TTS – open-source multi-speaker dialogue generator launched on May 2, 2025 with 6 votes and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Two synthetic voices can be individually convincing and still fail the moment they have to talk to each other. The difference is almost never the timbre. Single-utterance text-to-speech has been good enough to fool a casual listener for some time. Put two of those utterances in sequence and the illusion usually collapses. The voices remain clean, the pronunciation stays correct, and the result still sounds like a public address system reading a script rather than two people talking. The failure is not in the voices. It is in everything that happens between them. It helps to be precise about what a listener is actually tracking. Human conversation carries a dense layer of timing information…from diatts.com
Does a similar job
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