> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unoverse.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# api/audio.yaml

How a voice node binds to the platform's audio lane.

<div className="ref-source">
  Generated from <code>nodes/\_schema/audio.schema.json</code>, the same file the node
  linter validates against.
</div>

## Example

```yaml api/audio.yaml theme={"dark"}
# api/audio.yaml — only for a `transport: ws` voice node.
in:
  encoding: pcm16
  sampleRate: 24000
out:
  encoding: pcm16
  sampleRate: 24000
```

## Fields

<ResponseField name="in" type="object">
  How audio arriving from the caller reaches the vendor socket.
</ResponseField>

<ResponseField name="out" type="object">
  How audio from the vendor reaches the caller.
</ResponseField>

<ResponseField name="control" type="object">
  The non-audio messages that steer the call.
</ResponseField>

## Next steps

<Card title="Building a node" icon="boxes" href="/nodes/overview" horizontal>
  The guides behind these fields.
</Card>

<Card title="Troubleshooting" icon="wrench" href="/nodes/troubleshooting" horizontal>
  When a node does not do what you wrote.
</Card>