Hi there! I understand your audio is muted while using the Mega Photo Pro app. Let's get this sorted out. Just to clarify, is the audio muted only when playing videos or while you are editing photos and videos? Also, are you seeing any error messages, or does the app just have no sound at all?

Meanwhile, here are some initial troubleshooting steps specifically for Mega Photo Pro on your Windows device using WebKit:

1. Check your system audio:
- Make sure your PC volume is up and not muted.
- Check the sound mixer (right-click the speaker icon in the system tray and open Volume Mixer) to see if Mega Photo Pro or your browser has audio muted there.

2. Check the app's internal audio settings:
- Open the Mega Photo Pro app and look for any audio or volume controls within the app interface.
- Toggle any mute/unmute or volume options inside the app.

3. Restart the app and browser:
- Close Mega Photo Pro app completely.
- Restart your browser and reload the app page.

4. Clear temporary data:
- Clear your browser cache and cookies, as corrupted cache may cause strange app behavior including audio issues.

5. Test with other media:
- Play audio or video outside the Mega Photo Pro app in your browser to ensure your general sound setup works.

Could you let me know which steps you've tried already? That will help me guide you better in case we need to dive further or try advanced settings.