Audio not working in win 10 in virtualbox (virtualbox 5.1.2 + guest additions, macbook pro early 2011, osx el capitan)
had a similar problem (audio cracking/not working); what worked for me (Xubuntu as Host, VirtualBox 5.2.14) I found on stackoverflow marked off-topic:
- VirtualBox - open the settings for your Windows 10 machine
- Go to Audio > Audio Controller, change to 'ALSA Audio Driver' and "ICH AC97" as Controller
- Boot your Windows 10 machine and disable driver signature enforcement
- Go to Realtek website, download and install the AC'97 audio codec/driver for Vista/7 ("Vista/Win7 (32/64 bits) Driver only (ZIP file)") onto your Windows 10 machine (run setup.exe)
- Reboot Windows 10
Combination that worked for me (Ubuntu Host, Win10 guest) :
In Win10
- install realtek driver In virtualbox
- Host audio driver : PulseAudio
- Audio Controller: Intel HD Audio