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

December 2013 - Wwise v2013.2.4

• Unreal Wwise integration now officially supports PS4 and Xbox One platforms!
• Added platform selection to bank generation dialog box.
• Added bank generation dialog box to build menu.
• LinkedProject configuration parameter has been moved from Engine/Config/BaseEditor.ini to <Your Game>/Config/DefaultGame.ini.
• Added simple occlusion support.
• Fixed a crash when getting the UAkComponent from another component which has no owner.
• UI-130 Fixed: Fixed performance issues with the UAkComponent::UpdateAkReverbVolumeList method.
• UI-130 Fixed: Added a flag to the UAkComponent specifying if it is influenced by reverb volumes.
• UI-132 Fixed: Prevent UAkComponents from ticking on server configurations.
• UI-135 Fixed: Expose RTPC interpolation time.