To those of us that experience sound delays when using KDE, I think
I found the work around.
From the KDE menu, select "Preferences->Control Center"
Click on the Search tab and type in the search string "sound".
In the "Keywords" window below, click the option "sound".
Then, in the "Results" window, click on "Sound System".
In the right hand pane, you should see an option block called
"Auto-Suspend". Make sure that the "Auto-suspend if idle" box
IS checked. Then set the delay to some very small value. Such as
1 or 2.
This made all my sound problems go away.