I’m using the Paige voice from the Vapi provider, integrated with Twilio, and we’re intermittently experiencing audio distortion during live calls. The audio sometimes sounds slowed down / distorted (almost demonic). Observations: Occurs intermittently and can happen mid-call Not limited to long TTS responses Call logs from both Vapi and Twilio have been reviewed Configuration appears correct on both sides Codec and carrier are consistent (PCMU) Call SID: 019b709b-825f-777a-92ca-9183a973e8f0 Based on the logs, there doesn’t appear to be any codec mismatch or configuration issue. Could you please confirm: Is this expected behavior in real-time streaming scenarios? Are there known issues with Paige voice when used with Twilio? Any recommended mitigations or configuration changes to prevent this? This is impacting live calls, so assistance would be appreciated.

Actionable Step: To quickly isolate whether the distortion is caused by the Paige voice or the Twilio integration, use the Vapi dashboard's "Talk to Assistant" feature to test the Paige voice directly (without Twilio). If the issue persists in the dashboard, try switching to a different voice provider for comparison. This will help determine if the problem is specific to the Paige voice or related to the Twilio integration ([Debugging voice agents documentation](https://docs.vapi.ai/debugging)). Source: - [Debugging voice agents documentation](https://docs.vapi.ai/debugging)

@User Is Paige voice streamed as native PCMU 8kHz? Or is it generated as 16-bit PCM and converted on the fly?

I had a similar issue with a different voice.