Quick installation guide to enable the HiFi Shield audio output on Ubuntu.
setenv enabledac "enabledac"
set-default-sink alsa_output.platform-odroid_sound_card.5.analog-stereo
suspend-sink alsa_output.platform-odroid_sound_card.5.analog-stereo 1
Note: Applications like mpg321 will start a pulseaudio daemon if there isn't one running already. However, the HiFi shield cannot be opened until the pulseaudio suspend-on-idle timeout expires. This causes the application to exit with an error message reporting that the HiFi shield is busy.
aplay /usr/share/sounds/alsa/Front_Center.wav
Credit:
This instruction was made by culler (our forum member).
Original Post
Update
If your kernel version is 3.10.96-143 or higher, the I2S/DAC drivers have been changed to modules.
So you need to load the modules before enable the HiFi-Shield.
Refer this LINK