Apple’s patent for applying effects to clips with specific roles
The name of patent 9,240,215 may be ‘Editing operations facilitated by metadata,’ but it is about applying effects to roles in Final Cut Pro X:
For example, several clips may be assigned one audio role of “Dialog”, “Music”, or “SFX”. A process then provides one or more user interface controls. These user interface controls are also associated with the tagged clips. That is, the user interface controls are associated so that these controls can be used to display or modify properties of the tagged clips.