Low volume / noise in VAPI recordings despite clea...
# support
e
We're experiencing an issue with call recordings. When a user speaks at a normal or high volume during a live call, the VAPI recording afterwards either has extremely low volume or captures the speech as noise/distortion. Background: • We originally encountered this issue with the Nova model from Deepgram • We then switched to the Flux model with the following configuration: • endpointing: 10 • eotThreshold: 0.7 • eotTimeoutMs: 5000 • confidenceThreshold: 0.2 • waitSeconds: 0.2 • smartEndpointing: disabled • The issue persists after the switch Example call ID: 019d691a-6ece-7880-b9b8-8d131069edb7 Could you help us debug what might be causing the recording quality degradation? Specifically: 1. Is this a known issue with the recording pipeline? 2. Could any of our transcriber settings be affecting recording quality? Happy to provide additional call IDs or logs if needed.
a
This sounds less like a transcription/model issue and more like an audio pipeline problem. Your Deepgram settings won’t affect the actual recording quality—they only impact transcription behavior. The distortion and low volume usually point to gain staging, input clipping, or encoding issues somewhere in the call pipeline (mic input, WebRTC stream, or how VAPI stores/normalizes the recording). Given it happens at higher volumes, it’s likely clipping or compression during capture. I’d suggest checking the raw input levels and whether any automatic gain control or noise suppression is overcorrecting. If you can share a sample or logs, I can help pinpoint exactly where it’s breaking @esra
e
@Abayomi Praise heritage here is an example, my colleague still talks after 0:49 but vapi recording does not capture any of her sentences. Could you explain why this might be the case? https://cdn.discordapp.com/attachments/1491643858113794168/1491845926220861563/019d691a-6ece-7880-b9b8-8d131069edb7-1775584937224-d5cdbec0-47eb-4bbd-8d6c-4ea6396255de-stereo.wav?ex=69d92d49&is=69d7dbc9&hm=29debc360c8399be9fa6e800575bc56203326eb6578126ee1dce47f48eda20f8&
Do you have any explanations why we have this issue in this call?
Also, we observed significantly lower quality of vapi recordings in comparison to a few months ago (with the same machine, mic and everything) Did vapi change any preprocessing pipelines?
a
Kindly reach me here +1 (782) 624-5207 @esra What sApp
e
how can I reach to vapi team? Do they answer here?
c
please send the recording and the log file to support@vapi.ai and we will take a look at it