The banging sound is also the one used by the developer team: <a href="http:&#x2F;&#x2F;lists.llvm.org&#x2F;pipermail&#x2F;llvm-dev&#x2F;2008-July&#x2F;015629.html" rel="nofollow">http:&#x2F;&#x2F;lists.llvm.org&#x2F;pipermail&#x2F;llvm-dev&#x2F;2008-July&#x2F;015629.ht...</a>