en:c2_hifi_shield [ODROID Wiki]

Quick installation guide to enable the I2S audio output on Ubuntu.

HiFi-shield & HiFi-Shield+

The HiFi Shield Plus provides both stereo RCA connectors and a 3.5mm stereo jack (all gold-plated) to connect to external amplifiers and other audio equipment. An S/PDIF Optical output is also available. Via TI's high-end PCM5102 DAC chip(known as Burr-Brown), it supports 16, 24, 32 bit audio formats with minimal distortion (-93dB) and ideal dynamics (110dB+), plus amazing sampling rates of 384kHz

Assemble the C2 with the HiFi shield, attach a USB keyboard, USB mouse and HDMI monitor, then power up the system.
Update the System: sudo apt-get update && sudo apt-get dist-upgrade

To ensure that the HiFi shield kernel modules are loaded on Terminal.

odroid@odroid64:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S.27 dit-hifi-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
odroid@odroid64:~$
odroid@odroid64:~$ sudo modprobe snd-soc-pcm5102
odroid@odroid64:~$ sudo modprobe snd-soc-odroid-dac
odroid@odroid64:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S.27 dit-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ODROIDDAC [ODROID-DAC], device 0: I2S.27 pcm5102-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
odroid@odroid64:~$

To test, connect an amplifier to the 3.5mm or RCA lineout jack on the HiFi Shield, and then run:
Applications → Sound & Video → Sound → Hardware Tab & Output Tab select “ODROID-DAC”
If you want to use the Optical output on HiFi-Shile-Plus model, select “ODROID-HDMI”.

If you have to load the driver every time whenever your ODROID-C2 starts, simply you can register the driver into /etc/modules

odroid@odroid64:~$ su
Password:  /* root password is "odroid" */
root@odroid64:/home/odroid# echo "snd-soc-pcm5102" >> /etc/modules
root@odroid64:/home/odroid# echo "snd-soc-odroid-dac" >> /etc/modules
root@odroid64:/home/odroid# exit
exit
odroid@odroid64:~$

This adds one line at end of the file, /etc/modules, and load the driver on boot automatically.

Create /etc/asound.conf with the following content:

pcm.!default  {
 type hw card 1
}
ctl.!default {
 type hw card 1
}

Reboot again.

Check, if the sound card is enabled with “aplay -l”:

odroid@odroid64:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S.27 dit-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ODROIDDAC [ODROID-DAC], device 0: I2S.27 pcm5102-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
odroid@odroid64:~$

HiFi-shield2

The HiFi Shield 2 provides stereo RCA connectors to connect to external amplifiers and other audio equipment. An S/PDIF Optical output is also available. Via TI's high-end PCM5242 DAC chip(known as Burr-Brown), it supports 16, 24, 32 bit audio formats with minimal THD+N ratio (0.002%) and ideal dynamics (116dB+), plus amazing sampling rates of 384kHz. Volume control via I2C interface is great feature to keep the great audio quality with various audio output volume.

Assemble the C2 with the HiFi shield2, attach a USB keyboard, USB mouse and HDMI monitor, then power up the system.
Update the System: sudo apt-get update && sudo apt-get dist-upgrade

To ensure that the HiFi shield2 kernel modules are loaded on Terminal.

odroid@odroid64:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S dit-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
odroid@odroid64:~$ su
Password:  /* root password is "odroid" */
root@odroid64:/home/odroid# modprobe aml_i2c
root@odroid64:/home/odroid# modprobe snd_soc_pcm512x
root@odroid64:/home/odroid# modprobe snd_soc_pcm512x_i2c
root@odroid64:/home/odroid# echo pcm5242 0x4c > /sys/class/i2c-adapter/i2c-1/new_device
root@odroid64:/home/odroid# modprobe snd-soc-odroid-dac2
root@odroid64:/home/odroid# aplay -l
**** List of PLAYBACK Hardware Devices ***
card 0: ODROIDHDMI [ODROID-HDMI], device 0: I2S dit-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ODROIDDAC2 [ODROID-DAC2], device 0: I2S pcm512x-hifi-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
root@odroid64:/home/odroid#

To test, connect an amplifier to the RCA out jack on the HiFi Shield2, and then run:
Applications → Sound & Video → Sound → Hardware Tab & Output Tab select “ODROID-DAC2”
If you want to use the Optical output select “ODROID-HDMI”.

You want to add the HiFi-Shield2 sound_card on ODROID-C2 at boot by editing /etc/rc.local.

odroid@odroid64:~$ sudo nano /etc/rc.local
if [ -f /aafirstboot ]; then /aafirstboot start ; fi

echo Loading HiFi-Shield2 module
modprobe aml_i2c
modprobe snd-soc-pcm512x
modprobe snd-soc-pcm512x-i2c
echo pcm5242 0x4c > /sys/class/i2c-adapter/i2c-1/new_device
modprobe snd-soc-odroid-dac2

amixer -c 1 sset Analogue 0
amixer -c 1 sset Digital 201
amixer -c 1 sset Deemphasis on
echo Done.

exit 0

^G Get Help  ^O Write Out ^W Where Is  ^K Cut Text  ^J Justify   ^C Cur Pos
^X Exit      ^R Read File ^\ Replace   ^U Uncut Text^T To Linter ^_ Go To Line

Add the following at the bottom of the page above exit 0. ^x exit and save the file. Reboot your ODROID-C2.