Level Sequencer

The Sequence Editor within Unreal Engine 4 is a cinematic editing tool similar to Matinee. It allows users to add Tracks that can modify certain properties of Actors in a level.

For instructions on how to:

• create a Level Sequence, refer to https://docs.unrealengine.com/latest/INT/Engine/Sequencer/Overview/index.html#creatinglevelsequences
• add Tracks to a Level Sequence, refer to https://docs.unrealengine.com/latest/INT/Engine/Sequencer/Overview/index.html#addingtrackstosequencer.

Wwise Level Sequencer Tracks

The Wwise Unreal Engine 4 Integration adds two Tracks: AkAudioRTPC and AkAudioEvent. The AkAudioRTPC Track is used to set Game Parameter values, and the AkAudioEvent Track is used to post Wwise Events.

Both of these Tracks can be added as Master Tracks or associated to an Actor. When associated with an Actor, they perform their Wwise related functions on the UAkComponent attached to this Actor. When created as a Master Track, the AkAudioRTPC Track sets global RTPC values, and the AkAudioEvent Track posts Events on a "dummy" game object.

For AkAudioRTPC Tracks, Game Parameter curves can be modified using the built-in curve editor. Key frames can be added by placing the cursor at the appropriate location and pressing the Add New Key button (found on the right side of the listed Track).

An AkAudioRTPC track in the Curve Editor view

For AkAudioEvent Tracks, an AkAudioEvent can be added by placing the cursor at the appropriate location and pressing the AkAudioEvent button (found on the right side of the listed Track).

Adding an AkAudioEvent to an AkAudioEvent Track

AkAudioEvent Track Properties

From the AkAudioEvent location on the track, you can open a context menu which includes a Properties list with the following Wwise-specific properties for the section:

• Event: Lists the following editable properties of the AkAudioEvent for the selected section:
  • Event icon: Hover over the Audiokinetic Event icon to get the path to the Event. Double-click the icon to open the Event in the editor.
  • Audiokinetic Event: Open this list to create a new Audiokinetic Event, edit or copy the currently selected Event, or browse to another existing Audiokinetic Event.
  • Use Selected Asset from Content Browser: Sets the list to use, if applicable, the Event currently selected in the Content Browser.
  • Browse to Asset in Content Browser: Opens the Content Browser to the location of the list's currently selected Event.
  • Reset to Default: Resets the list's selection to the default Event.
• Stop at Section End: Uncheck this box to keep the Event playing when the end of the section is reached (on by default).
• Event Name: Enter the exact name of the desired Event. This field is ignored if an Event is already selected in the Audiokinetic Event list.

Wwise Project Setup

To ensure that Event lengths are properly represented in the AkAudioEvent Tracks, the Wwise project needs to be set up to estimate the duration of its audio Events and JSON metadata must be generated. To enable these project-wide settings, go to the Project Settings' SoundBanks tab. Enable the Estimated duration check box within the Metadata Options group box and enable the Generate JSON Metadata check box within the SoundBank Settings group box, as seen below.

Required Project Settings for AkAudioEvent Tracks