Speaker separation Example

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

ODROID-C1+/C2

1.  Connect the stereo boom bonnet to ODROID-C1+/ C2 using an I2C cable, attach a USB keyboard, USB mouse and HDMI monitor, then power up the system.

2.  Update the System: 

   sudo apt update && sudo apt dist-upgrade

    

    

3.  To ensure that the stereo boom bonnet 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:~$

    

4.  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 

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”:

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:~$

ODROID-XU4

Adding a RCA connector for Lineout

•   Adding a RCA Line-out example schematics 

Stereo Boom Bonnet support

Android supports only 44.1.Khz/16bit output.

BLOCK DIAGRAM

Power consumption

1Khz sine wave playback
Full scale with sound clipping: 6 Watt
Lowering output volume to minimize the clipping: 2 Watt

Pop-up noise

Speakers don't generate pop-up noise in power on and off process.
But Earphone output generates pop-up noise in the power-on process.
The normal power-off process doesn't make any noise.