You shouldn't need to edit system files, though. Create the file /home/<username>/.config/pulse/daemon.conf with these lines:
default-fragments = 2 default-fragment-size-msec = 4Then either reboot or restart PulseAudio by running
pulseaudio -kand hopefully that'll do it. You might need to fiddle with the numbers a bit, but those worked for me. I also didn't need the tsched = 1 setting they suggest.