> **Experimental**
>
> `@aws-cdk/aws-medialive-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# AudioTrackConfig

Configuration for a single audio track in a track-based selector.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/audio-selector.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-medialive-alpha/lib/audio-selector.ts#L102)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as medialive_alpha from '@aws-cdk/aws-medialive-alpha';

declare const audioPreMixerSettings: medialive_alpha.AudioPreMixerSettings;
const audioTrackConfig: medialive_alpha.AudioTrackConfig = {
  track: 123,

  // the properties below are optional
  premixSettings: audioPreMixerSettings,
};
```

## Properties

- `premixSettings`: [AudioPreMixerSettings](/cdk/api/v2/docs/@aws-cdk_aws-medialive-alpha.AudioPreMixerSettings.html) — Pre-mixer settings for this track (gain, channel remix, loudness normalization).

  **Default:** no pre-mixing

- `track`: number (required) — The 1-based track number to extract.