Sony SRS-HG1 Help Manual page 162

Select a song to play and adjust the volume.
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The selected song will be heard from the speaker.
To enjoy a more dynamic sound
Pull the lever on the bottom of the speaker in the direction of the arrow shown in the illustration below to remove the grille.
* After removing the speaker grille, do not touch the exposed part of the speaker (speaker units), and keep the removed grille on a flat surface to prevent
distortion.
Hint
After SongPal is downloaded and installed to your smartphone/iPhone, you can use your smartphone/iPhone as a remote control to operate
devices connected to the speaker.
Note
The procedure explained above is for guidance only. Normally, the volume level on a PC and the speaker do not synchronize. However,
depending on the version of Windows Media Player installed on a PC or the PC's condition, the volume levels may synchronize.
The speaker can play MP3, WMA, AAC and WAV format files (only AAC files with the extension ".m4a," ".mp4," or ".3gp" can be played). Even if
the bit rate and file format are supported, the playing back of all files is not guaranteed. There may be a specification change.
Files with DRM (Digital Rights Management) copyright protection cannot be played on the speaker. To check if a 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 to start, since each DLNA-compatible device has to recognize the component
currently used.
Some content may not be playable with DLNA certified products.
Related Topic
Setting your PC as a DLNA server and controller (Windows 8.1)
Listening to music on a PC via a Wi-Fi network
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