VAPI•8mo ago

latency on calls using Zadarma numbers

Has anyone had issues with audio latency on calls using Zadarma numbers?

Ai agente voice speak so slowly and sound like dial-up conection, im using high quiality 11labs voice.

Vapi Support BotAPP•5/14/25, 4:51 PM

To address audio latency and slow/distorted AI voice on your Zadarma calls, try optimizing your TURN server settings, as high TURN latency (1200–2000 ms) can cause significant delays and poor audio quality. Ensure your TURN servers are geographically close to your users and check for any network or provider issues. If using 11labs, switching to a different voice model (e.g., from "flash" to "turbo") may also help reduce artifacts and improve quality.

Sources:

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

extreme-purple•5/14/25, 7:33 PM

This issue may be due to improper SIP configuration, network latency, or high processing demands from ElevenLabs voices; optimizing your SIP trunk, adjusting server settings, using less resource-intensive voices, and fine-tuning Vapi assistant settings can help resolve these issues.

VVapi Support Bot To address audio latency and slow/distorted AI voice on your Zadarma calls, try ...

DuckieAPP•5/19/25, 7:07 PM

Message marked as helpful by @LuisDMB3!

Eextreme-purple This issue may be due to improper SIP configuration, network latency, or high pr...

moderate-tomatoOP•5/19/25, 7:07 PM

thanks i will try this

latency on calls using Zadarma numbers

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