SOYO SY-K7V DRAGON Plus! User Manual page 181

Test Your Speakers Connection
To make sure that the front and the rear speakers are correctly
connected, you can use the following program to testify
individual speaker output. Move cursor to whichever speaker
you want to test and left-click the mouse. If the setup is correct,
you can hear music coming from that speaker alone. Each
music output is different for distinction.
The Center and Subwoofer speakers are only supported by
chip model 039 and the following models.
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