[ubuntu] audio not working over HDMI

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http://ubuntuforums.org – Hi, I've just set up Ubuntu running on what I hope to be a media computer. Video over HDMI works fine but audio does not. I'm using the onboard HDMI port on a Asus F1A75-M motherboard. HDMI doesn't show up as an option in System Settings -> Sound. Here is the output of aplay -l Code: $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]   Subdevices: 1/1   Subdevice #0: subdevice #0 card 1: Generic_1 [HD-Audio Generic], device 0: VT1708S Analog [VT1708S Analog]   Subdevices: 1/1   Subdevice #0: subd (Hardware)