Hello, I'm having a problem with calls. I have Spanish Telnyx numbers connected to Vapi. The connection itself is fine, but when making calls, the agent can't hear the caller's voice or it's very distorted. The Telnyx recording is perfectly clear. Do you have any idea why this is happening? 019ce113-abef-7fff-acdd-e2d908fa58c8

It sounds like a codec mismatch may be causing the audio distortion. Please ensure your Telnyx SIP trunk's outbound settings match the following recommended codecs:

- OPUS: checked
- G729: checked
- G711A: checked
- G711U: checked
- G722, H.264, VP8, AMR-WB: unchecked

Update these settings in your Telnyx portal and test again—this often resolves one-way or distorted audio issues when using Vapi with Telnyx numbers. Reference: See the [Vapi Telnyx SIP integration guide](https://docs.vapi.ai/advanced/sip/telnyx). Source: - [Telnyx SIP integration](https://docs.vapi.ai/advanced/sip/telnyx)

I have these codecs. It doesn't change anything. It still sound distorted.