ODROID-C1+/C2

• Connect ​the stereo boom bonnet ​to ODROID-C1+/​C2 using an I2S cable, attach a USB keyboard, USB mouse and HDMI monitor, then power up the system.
  
• Update the System:

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  sudo apt update && sudo apt dist-upgrade

  
  

• To ensure that the stereo boom bonnet kernel modules are loaded on Terminal.
  

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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:~$

• Applications → Sound & Video → Sound → Hardware Tab & Output Tab select “ODROID-DAC”
  

If you have to load the driver every time whenever your ODROID-C1+/C2 starts, simply you can by registering the driver into /etc/modules

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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:~$ 

Reboot again.

Check it by “aplay -l”:

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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:~$

Boom bonnet sound test with sample wav file

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odroid@odroid64:~$ aplay -D hw:1,0 testfile.wav

Change default sound output

• check your sound device number
• The number zero means the boom bonnet output on C2 Ubuntu 18.04 mate.

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odroid@odroid64:~$ pactl list short sources
0	alsa_output.platform-odroid_dac.stereo-fallback.monitor	module-alsa-card.c	s16le 2ch 44100Hz	SUSPENDED
1	alsa_output.platform-odroid_hdmi.stereo-fallback.monitor	module-alsa-card.c	s16le 2ch 44100Hz	SUSPENDED
2	alsa_input.platform-odroid_hdmi.analog-mono	module-alsa-card.c	s16le 1ch 44100Hz	SUSPENDED

• Set the default with the device number

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odroid@odroid64:~$ echo set-default-sink 0 | sudo tee -a /etc/pulse/default.pa

ODROID-C4

• Connect ​the stereo boom bonnet ​to ODROID-C4 using an I2S cable, attach a USB keyboard/mouse and HDMI monitor, then power up the system.
  
• To enable the sound card, you need to modify the config.ini file.
  

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root@odroid:~$ vi /media/boot/config.ini

• Change the config.ini file to apply the hifishield dtbo file.
  

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...
overays="spi0 i2c0 i2c1 uart0 hifishield"
...

• Change the DTB file for sound card. Then reboot.
  

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root@odroid:~$ reboot

• You can see that the sound card is enabled.
  

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root@odroid:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ODROIDHDMI [ODROID-HDMI], device 0: SPDIF-dit-hifi dit-hifi-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: ODROIDHiFi [ODROID-HiFi], device 0: TDM-B-pcm5102a-hifi multicodec-0 []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
root@odroid:~#

• To test, connect an amplifier to the 3.5mm or streo speaker on the boom bonnet, and then run:
  
• Applications → Sound & Video → Sound → Hardware Tab & Output Tab select “Stereo Output + Stereo Input”
  

ODROID-XU4

• XU4 system doesn't need any software tweak to enable the boom bonnet sound output.