ConceptTTFB / Time to First Byte
First-Packet Latency
A metric measuring the time from when a request is sent to when the first segment of response data is received. In speech synthesis it determines how long the user waits to hear the first sound and is a key metric for evaluating the experience of real-time voice agents.
Timeline (last 90 days)
Oct 2
The industry typically uses Time to First Audio Chunk as the core metric for real-time TTS.
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