Some users of Voice SDK v46 have reported seeing a crash originating due to a NullPointerException in the native Java Voice SDK library. The unity package linked below provides a patch for Voice SDK v46.

To address this issue, install the latest all-in-one Meta XR All-in-One SDK, and then download and import the voicesdk-v46-patch.

Only one script can access the microphone at a time when multiple scripts use Unity’s Microphone.Start method. For example, Voice SDK’s Mic.cs script uses Microphone.Start to obtain a microphone stream when the GameObject it is on is enabled. However, other scripts such as LipSyncMicInput.cs in the Avatar2 package will also attempt to obtain the microphone stream and fail. Other scripts, like LipSyncMicInput.cs, may disable the microphone stream used by Mic.cs when used together.

Voice SDK has an abstract class that allows other scripts to record the microphone and share the stream with Voice SDK. The example script LipSyncMicRef.cs implements the mic sharing script base class, allowing the Avatar2 LipSyncMicInput script to handle mic input while also providing mic access to Voice SDK. This should fix the issue of the Voice SDK losing mic access on Idle as well as the end-user’s Avatar not showing mic lip sync movements. If your application has any other scripts that may be using the microphone, create your own child of MicBase.cs in order to fix any issues that may be encountered.

To solve this issue in v42, follow these steps:

For Android apps, set internet access as required in your Unity app’s project settings to avoid a NameResolutionFailure.

In Unity’s Edit > Player project settings window, the Internet Access drop-down list must be set to Require.

Shrinking code using R8 for android apps removes references to classes that are referenced using reflection. For this reason, it’s necessary to configure the project so that it keeps certain packages that are accessed this way.

In Unity’s Edit > Player project settings window, the Custom Proguard File must be checked.

In the Project, go to the Assets/Plugins/Android folder and open the proguard-user.txt file. Add the following 2 lines to the file.

-keep class com.oculus.** {*;}
-keep class com.facebook.assistant.**  {*;}