I surf the internet in a guest virtual linux machine so that I can replace the VM if a virus manages to download itself.
I noticed choppy sound after upgrades occurred.
After playing with every combination - I discovered that the 5.2.24 guest was not the problem - It was the host.
Apparently the update that Virtualbox did changed the sound timeout from 100ms to 250ms and that causes choppy output.
Reinstalling the host virtualbox 5.2.20 and locking it in zypper is the only fix as Opensuse wants to replace it as soon as it checks for updates.
This is a FYI.
Here is how to see what version is running on the host OpenSUSE.
# zypper se -si | grep virt i+ | virtualbox | package | 5.2.20-lp126.96.36.199 | x86_64 | openSUSE-Leap-15.0-Update i+ | virtualbox-host-kmp-default | package | 5.2.20_k4.12.14_lp150.12.22-lp188.8.131.52 | x86_64 | openSUSE-Leap-15.0-Update i+ | virtualbox-qt | package | 5.2.20-lp184.108.40.206 | x86_64 | openSUSE-Leap-15.0-Update #