I have an issue with sound in a Standalone Win10 VM with QWT 4.1-65.
When I activate it with qvm-features vm_name audio-model ich6, it works only for the first time, but if I reboot the VM, it shows the sound as working and you can select it, however there is no more sound.
Deactivating and reactivating the ich6 or ich9 audio model result in the same issue.
So I can’t have a “persistant sound” working.