Sony PCV-RZ49G - Manual (Page 262)

There is a popping sound when Media Center is downloading the Guide
If Media C enter makes a popping sound when the Guide is downloading, then you might want to turn off taskbar notifications in the
Guide. The sound you hear is the audio that accompanies the notification for when the Guide is downloading. However, if you turn off
notifications, then Media C enter cannot notify you of Recording errors or Guide downloading errors from the taskbar when Media C enter
is closed or in windowed mode.
Related topics
Turn on or turn off taskbar notifications
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