First ensure that VirtualBox using the PulseAudio driver. If the bug is still present, please attach a PulseAudio verbose log according to https://wiki.ubuntu.com/PulseAudio/Log
What version of Ubuntu are you running?
First ensure that VirtualBox using the PulseAudio driver. If the bug is still present, please attach a PulseAudio verbose log according to https:/ /wiki.ubuntu. com/PulseAudio/ Log
What version of Ubuntu are you running?