How to Use Supstronics X400 Expansion Board

This will show you how to use the Supstronics x400 Expansion Board with Raspberry Pi.

Check it out here

What is it?

It is a SPI audio driver for the RaspberryPi here are some specs:

• Full-HD audio – up to 24-bit/192kHz playback

• Class leading audio; 112db SNR, and THD of 0.0019%

• Audiophile TI Burr Brown 32-bit/384kHz DAC (TI PCM5122)

• Uses the digital I2S audio signals to reduce CPU load over USB audio solutions

• Integrated hardware volume control

• Mute can be enabled/disabled via jumper

• Built in High quality audio headphone amplifier (TI TPA6133A)

• Earphone AMP can be enabled/disabled via jumper

• Built in High quality Class-D stereo audio amplifier (TI TPA3118D2)

• Up to 2 x 20W into 4 ohm

• AMP can be enabled/disabled via jumper

• Phono/RCA connectors

• 3.5mm stereo audio jack

• Speaker terminals

Step 1: Build the Setup

Just put the standoffs on then screw it all down. It's simple.

Step 2: Edit /etc/boot.txt

You are now going to need to edit /etc/boot.txt so we can change the soundcard. First in the terminal (ssh) type:

sudo nano /etc/boot.txt

Once that is open add the fallowing line:

dtoverlay=iqaudio-dacplus

Step 3: Edit /etc/modprobe.d/raspi-blacklist.conf

Enter the fallowing into the terminal(ssh):

sudo nano /etc/modprobe.d/raspi-blacklist.conf

Comment out these lines (if they exist):

blacklist i2c-bcm2708
blacklist snd-soc-pcm512x

Step 4: Edit the /etc/modules file

Enter the fallowing into the terminal(ssh):

sudo nano /etc/modules

Then add the fallowing:

snd_soc_bcm2708
snd_soc_bcm2708_i2s
bcm2708_dmaengine
snd_soc_pcm512x
snd_soc_iqaudio_dac

Step 5: Setup OSMC Audio Output

• Go to "My OSMC"

• Click on "Pi Config"

• Make sure the right soundcard is selected, then click Ok.

Step 6: Test it Out!

WARNING! - Do Not Power the Raspberry Pi through the Micro USB Port. Use the DC Plug on the x400 Board

Plug everything in, the sound quality is awesome. I hope you enjoyed the project! If you have any questions leave them in the comments.

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