Sony WH-L600 Help Manual page 56

Help Guide
Digital Surround Headphone System
WH-L600
The surround sound effect is not obtained
Select "CINEMA," "GAME" or "SPORTS" for the sound field mode.
The sound being played is not a multi-channel signal.
Depending on the audio output setting on the TV or HDMI device, multi-channel signals are down-mixed to 2-channel
to be output. In this case, change the setting on the device so that a multi-channel signal is output.
Related Topic
Setting the sound field mode (SOUND FIELD button)
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