@daanavitch: I'm sorry to say (mostly because I want to do upgrade!!) that I will do my mavericks install tomorrow. So you just have to wait a little bit longer.
@gorsok: I'm happy my remark about the new appleHDA.kext was helpful. Since I did not install Mavericks until now, it was more a guess than a advice or something, but I'm happy it works and encourages everyone to upgrade to Mavericks.