I found what is the error with the volume in the Zenbook 3. The problem the incompatibility between the 4 speakers in the notebook and the system. I tryied to change the 4 to 2 speakers in the configurations audio and it worked fine, but with 4 speakers it is not working. The rear speakers dont change the volume, but the front speakers yes. I think the problem is the SO doesn't recognize the 2 extra speakers. Help Me and help the world!! :-D
