Each version of this integration matches a specific build of Unreal Engine 4. Here is what has changed in the Unreal Engine July 2013 release of the integration (in addition to upgrading to the new Unreal build).

July 2013 - Wwise v2013.1.1

• Added message box in case of error during SoundBank Generation.
• New, distinct colors for Audiokinetic Event and Audiokinetic Bank asset types in the Content Browser.
• Fixed compilation on Xbox One and PS4 platforms.
• Fixed issue with AnimNotify_AkEvent using the wrong type.
• Fixed update of AkComponent Game Object position.