# Generating audience-specific manifests
<a name="generating-audience-specific-manifests"></a>

To retrieve a manifest for a particular audience, use the `aws.mediatailor.channel.audienceId` query parameter. This query parameter may be dynamically appended by your CDN or added through a call to your content or customer-management system. You must maintain the association of a given playback session to an `audienceId` outside of MediaTailor. This will retrieve an audience-specific manifest with any alternate media defined for that audience in place of default content. It is important that once a manifest is requested for a particular audience that the player always requests the manifest with that same audience ID or there could be playback errors.

If a request is made for an audience that does not exist on the channel, MediaTailor returns a 404 error.

**Example Getting a manifest for an audience**  
`https:// prefix>.channel-assembly.mediatailor.us-west-2.amazonaws.com/v1/channel/ExampleChannel/index_dash.mpd?aws.mediatailor.channel.audienceId=Seattle`