Kubuntu 25.04 here. Did you edit the audio quantum setting? If not, you should. It may or may not be the same issue, but I would get occasional buzzing when playing games. It turns out the default audio buffer time is really small, so when you’re doing something CPU intensive (such as playing games), the CPU can’t consistently fill out the buffer on time, leading to occasional audio hiccups. Increasing the audio buffer time will slightly (ie, imperceptibly) increase audio delay and will give the CPU more time to fill out the audio buffer, which solved the audio issue for me. Try putting this line:
Kubuntu 25.04 here. Did you edit the audio quantum setting? If not, you should. It may or may not be the same issue, but I would get occasional buzzing when playing games. It turns out the default audio buffer time is really small, so when you’re doing something CPU intensive (such as playing games), the CPU can’t consistently fill out the buffer on time, leading to occasional audio hiccups. Increasing the audio buffer time will slightly (ie, imperceptibly) increase audio delay and will give the CPU more time to fill out the audio buffer, which solved the audio issue for me. Try putting this line:
context.properties = {default.clock.min-quantum} = 1024into /etc/pipewire/pipewire.conf.d/pipewire.conf
(you may have to create some folders and files).
Then restart and see if that fixes anything