As anounced here comes the sound update!

New Features

• Game Sounds (not final)
• Music
• Zombie Sound System (Sound is relevant for zombie behaviour. Even distant zombies will hear loud noises - for example when a gun is fired - and look for its source.)
• new Building: Depot with 30 inventory slots (In future versions only items in Depots and similar buildings will be treated as items in the posession of the group)
• added new Item: Wooden Planks

Improvements

• new Grave model
• significantly improved performance
• bug fixes, especially considering the GUI