SUMMARY If you use an audio theme, setting any sound notifications directly silently fails. STEPS TO REPRODUCE 1. Select Ocean sound theme (not sure if that matters, but it is what I have) 2. Open up SystemSettings | Notifications | Configure 3. Pick an application that has a sound notification (even if it is not being used currently). 4. Ensure Play a Sound is selected 5. Use the folder to pick a sound outside the current theme directory (I took one out of the Oxygen theme so I know it was correctly encoded, etc.) 6. Press the play button to the left of the sound. Hear nothing. (Note that it puts a file:/// URL here but I guess that's OK -- changing it to a path has no effect). 7. In fact, pick a file in the ocean theme. No effect when pressing Play. 8. Find an item that is in the theme (e.g., Plasma Workspace | Login) 9. Note that the entry there is a single name (desktop-login) 10. Use the file picker to pick the very same file (now has file:/// in front of it). 11. No sound when pressing play 12. Press the revert button next to the file picker 13. Press play -- hear the sound. OBSERVED RESULT It appears to me (without looking at the code yet) that all notification sounds get passed to the theme who either interprets them as "token" or ignores them if it doesn't know what they are. So, in other words, because the theme doesn't provide a sound for AngelFish "website notification" there is no way to set a sound for that notification without editing the theme. EXPECTED RESULT You'd think you could override the theme, especially for things the theme doesn't provide. I get that the theme has to overwrite when it is installed but it seems like it should pass anything unknown to the file system. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: 6.03 (available in About System) KDE Plasma Version: 6.03 KDE Frameworks Version: 6.0.0 Qt Version: ADDITIONAL INFORMATION