Hello ! I purchased the Acer VN7-592g (Intel i7-6700HQ/ NVIDIA GTX960M-4G/ 16GB RAM) 1 year ago, and I replaced Windows 10 with a Linux OS (Debian). Everything works very well and I love it very much. However, the only problem is that I cannot find a way to enable the Dolby Audio Enhancement of the 4-Speaker. Although the official description about this laptop said that it has 4-Speak, I can only use 2-Speaker (Stereo) though pulseaudio/ ALSA. Dolby Atom sounds really good. Does anyone know a way to fully use its sound system? I will be happy if I am able to use it. Sorry for my bad English as I am a Hong Kong student.