Gigabyte GV-RX345256H User Manual page 19

Configuring Audio Output
Configure the default audio output device based upon your needs.
Step 1:
Go to Start > Control Panel > Sounds and Audio Devices.
Step 2:
In the Sounds and Audio Devices Properties dialog box, click the Audio tab.
Using the picture to the left as the example, to set HDMI audio to be
the default Sound Playback device, in the Default device box,
select ATI HD Audio rear output. Otherwise, select Realtek HD
Audio output, which is the onboard audio controller.
- 19 - Software Installation