Text-to-speech - AiQL Handbook

The text-to-speech model turns written answers into spoken audio. Observatory uses it when a member plays a reply aloud. It does not transcribe. Speech-to-text is a separate model. Duplex voice is speech-to-speech.

Parameters

The production synthesizer is a low-latency neural text-to-speech model.

Parameter	Value
Kind	Neural text-to-speech
Input	Answer text, up to 2k tokens
Output	Spoken audio as `mp3`
Voice	A selected speaking voice. Customers do not pick the checkpoint

Configuration

Setting	How it is configured
Where it runs	Spoken playback of Explore replies in Observatory.
Format	Streaming `mp3`.
Serving	AiQL selects the checkpoint and the default voice.

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