HDMI Sound on Ubuntu with Shuttle DS61

If you have issues getting the sound to work using Ubuntu via HDMI, perform the following steps in order:

• Confirm that the volume on your computer is not on mute.

pacmd
>> list-sinks

It the volume is on mute, you will see an entry that states "mute: on". Otherwise you will see "mute: off".

• Add your user the the audio, pulse audio, and video groups. Replace "userID" with the ID of the user.

sudo usermod -a -G audio,pulse,pulse-access,video,voice userID

You would think Ubuntu would be smart enough to automatically do this, but apparently not.

• Install pavucontrol

sudo apt-get install -y pavucontrol

• Install the ALSA drivers and add the repository to your system.

sudo add-apt-repository ppa:ubuntu-audio-dev/alsa-daily
sudo apt-get update
sudo apt-get install oem-audio-hda-daily-dkms

• Reboot your computer
• Force reload the drivers into ALSA.

sudo alsa force-reload

• Go to System Settings > Sounds. On the Configuration tab, change the Profile option to HDMI.
• Play an audio or YouTube clip to confirm that the sound is working.