Sony SRS-X99 Help Manual page 17

WMA file is protected by DRM, right-click the file on the PC. If there is a [License] tab, the file is DRM-copyrighted.
When you listen to music via a home network, it may take some time, since each DLNA-compatible device has to
recognize the component currently used.
Some content may not be playable with DLNA certified products.
Related Topic
Parts and controls (Remote control)
Using the BLUETOOTH/Network standby function
Setting your PC as a DLNA server and controller (Windows 7)
Listening to music on a PC via a Wi-Fi network
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