hello, host: centos6 64bit (dell desktop) guest: windows 7 64bit virtualbox: 4.3.30 problem: host has audio but guest does not. i.e. when virtualbox comes up, it says: No audio devices could be opened. ErrorID: HostAudioNotResponding #lspci -nn | grep -i audio 00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8 086:1c20] (rev 04) 01:00.1 Audio device [0403]: NVIDIA Corporation GF119 HDMI Audio Controller [10de:0e08] (rev a1) Pulse audio and Alsa installed on the host. trying these settings have not worked so far letting me have audio on the guest: Host Audio Driver: OSS,PULSE,ALSA Audio Controller: Intel HD I am not seeing any audio-related errors in virtualbox log. lot of time spent on this so far; any idea as what to do next will be greatly appreciated. thank you, F-