The Unreal integration provides audio input to Wwise through the Wwise Audio Input Source Plug-in. In order to provide audio input to Wwise, classes must inherit from AkAudioInputComponent.

AkAudioInputComponent

AkAudioInputComponent is derived from AkComponent. It is a specialized AkComponent that you can use to provide audio input to Wwise. To do so, you must implement two key functions:

AkAudioInputComponent also has one Blueprint function, Post Associated Audio Input Event, which posts the component's AkAudioEvent to Wwise along with the associated AudioSamples callback and AudioFormat callback, using this component as the game object source.

Customizing Audio Input Behavior

You can write custom classes that derive from AkAudioInputComponent in order to implement custom audio input behavior. The following UAkVoiceInputComponent.h and UAkVoiceInputComponent.cpp examples show a class that takes microphone input and pipes it to the Wwise Sound Engine.

Before you can use these files in a C++ Unreal project, you must perform some initial setup. First, add the AkAudio and the Unreal Voice modules to the PublicDependencyModuleNames in the project's Build.cs file. For example:

Next, add the following lines to the DefaultEngine.ini file:

After these setup steps are complete, add the desired custom behavior. In the following example, a class takes microphone input and sends it to Wwise.

Note: The sample code in this section is not intended for use in shipped games. It is only a short example of how to implement custom behavior. Here is an example of a customized AkVoiceInputComponent.h file: Here is an example of a customized AkVoiceInputComponent.cpp file: After you add the class to an Unreal project, you can create a custom Blueprint class that has an AkVoiceInputComponent, and can call the Post Associated Audio Input Event Blueprint function (from base class AkAudioInputComponent) to start sending microphone data to Wwise. The following image shows part of the Blueprint for a custom Blueprint class, based on Actor, that has an AkVoiceInputComponent called AkVoiceInput.