Adcom GIA-275 User Manual page 14

11) Click on Sound
You should see that the ADCOM GIA-275 has been selected as the Default Device for Speakers. If it
has not been set as the Default Device, click on it to select it and then click on Set Default.
12) Click Apply, then click OK. Exit the Control Panel and reboot your system.
You should now be able to play CD quality music through the GIA-275 using Windows Media
Player or any other media player that you have installed.