---
title: Audio Components in Compound Clips
framework: professional-video-applications
role: article
path: professional-video-applications/audio-components-in-compound-clips
---

# Audio Components in Compound Clips

## Audio Components in Compound Clips

Audio Components in Compound Clips Manipulate audio components in compound clips based on each clip’s role.

Overview

When you reference a compound clip in a timeline, you can manipulate its audio components based on the clip’s role. By default, Final Cut Pro merges components from the compound clip with the same main role into a single component. Override this behavior to see the individual subroles by setting the `ref-clip` element’s `useAudioSubroles` attribute to 1.

In the code listing below, the `ref-clip` element references a compound clip, created from the clip from the first clode listing in the [Compound Clip Media](/documentation/professional-video-applications/compound-clip-media) page. Because the `useAudioSubroles` attribute is set to `1`, all subroles are accessible. The example applies `Rumble Reducer` effect on the two components with the `dialogue` subroles. The volume on the component with the `music.music-1` subrole is turned down by `6dB`.

```swift <ref-clip name="MyCompoundClip" ref="r1" duration="5s" useAudioSubroles="1">   <audio-role-source role="dialogue.dialogue-1">       <filter-audio ref="r6" name="Rumble Reducer" />    </audio-role-source>    <audio-role-source role="dialogue.dialogue-2">       <filter-audio ref="r6" name="Rumble Reducer" />    </audio-role-source>    <audio-role-source role="music.music-1">       <adjust-volume amount="-6dB" />    </audio-role-source> </ref-clip> ```