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# AWS::MediaLive::Channel AudioPreMixerSettings
<a name="aws-properties-medialive-channel-audiopremixersettings"></a>

Contains settings for preprocessing audio before interleaving, including loudness normalization, channel remixing, and gain adjustment. Apply these settings to individual PIDs or audio tracks to control audio output characteristics before the tracks are combined.

## Syntax
<a name="aws-properties-medialive-channel-audiopremixersettings-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-medialive-channel-audiopremixersettings-syntax.json"></a>

```
{
  "[AudioNormalizationSettings](#cfn-medialive-channel-audiopremixersettings-audionormalizationsettings)" : {{AudioNormalizationSettings}},
  "[Channels](#cfn-medialive-channel-audiopremixersettings-channels)" : {{Integer}},
  "[GainDb](#cfn-medialive-channel-audiopremixersettings-gaindb)" : {{Number}},
  "[RemixSettings](#cfn-medialive-channel-audiopremixersettings-remixsettings)" : {{RemixSettings}}
}
```

### YAML
<a name="aws-properties-medialive-channel-audiopremixersettings-syntax.yaml"></a>

```
  [AudioNormalizationSettings](#cfn-medialive-channel-audiopremixersettings-audionormalizationsettings): {{
    AudioNormalizationSettings}}
  [Channels](#cfn-medialive-channel-audiopremixersettings-channels): {{Integer}}
  [GainDb](#cfn-medialive-channel-audiopremixersettings-gaindb): {{Number}}
  [RemixSettings](#cfn-medialive-channel-audiopremixersettings-remixsettings): {{
    RemixSettings}}
```

## Properties
<a name="aws-properties-medialive-channel-audiopremixersettings-properties"></a>

`AudioNormalizationSettings`  <a name="cfn-medialive-channel-audiopremixersettings-audionormalizationsettings"></a>
The audio normalization settings for loudness control. When specified, the service normalizes audio loudness according to the chosen algorithm.  
*Required*: No  
*Type*: [AudioNormalizationSettings](aws-properties-medialive-channel-audionormalizationsettings.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Channels`  <a name="cfn-medialive-channel-audiopremixersettings-channels"></a>
The number of audio channels to remix the audio to. If you don't specify a value, the service passes through the original channel count. The remixSettings setting overrides this value when specified.  
*Required*: No  
*Type*: Integer  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`GainDb`  <a name="cfn-medialive-channel-audiopremixersettings-gaindb"></a>
The gain adjustment, in decibels (dB), to apply to this audio.  
*Required*: No  
*Type*: Number  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`RemixSettings`  <a name="cfn-medialive-channel-audiopremixersettings-remixsettings"></a>
The settings that control how the service remixes input audio channels. When specified, these settings provide fine-grained control over channel mapping and gain levels, and take precedence over the channels setting.  
*Required*: No  
*Type*: [RemixSettings](aws-properties-medialive-channel-remixsettings.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)