Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed in the Unreal Engine March 2014 release of the integration (in addition to upgrading to the new Unreal build).

March 2014 - Wwise v2013.2.6

• Visual Studio 2013 is now used by default. Please refer to the Requirements page for more details.
• UI-146 Fixed: Fixed non-unity build compilation errors.
• UI-147 Fixed:
  • Verify the SoundEngine is initialized in the AkComponent tick function;
  • Properly set the collision channel name for AkReverbVolumes;
  • Avoid loading banks in a commandlet;
  • Removed the automatic bank creation mechanism.
• UI-148 Fixed: Use "Get Player Controller" in the RTPCDemo Blueprint to ensure sound keeps playing when transitioning between "Simulate" and "Possess" modes in Editor.