Manually Installing I2S Digital Audio

Manually Installing I2S Digital Audio

This process will work on all devices I have created.
All pre-made images available to download are already configured with this driver

1. Login into your Raspberry Pi via Putty

2. Edit the raspi blacklist with:
sudo nano /etc/modprobe.d/raspi-blacklist.conf

If the file is empty, just skip this step, However, if you see the following lines:
blacklist i2c-bcm2708
blacklist snd-soc-pcm512x
blacklist snd-soc-wm8804


Update the lines by putting a # before each line


3. Save by typing Control-X Y <return>

Disable headphone audio (if it's set)

1. Edit the raspi modules list with
sudo nano /etc/modules
If the file is empty, just skip this step, however, if you see the following line:
snd_bcm2835


Put a # in front of it



2. Save with Control-X Y <return>

3. Create asound.conf file
Edit the raspi modules list with
sudo nano /etc/asound.conf
This file should be blank.


4. Copy and paste the following text into the file:
pcm.speakerbonnet {
   type hw card 0
}

pcm.dmixer {
   type dmix
   ipc_key 1024
   ipc_perm 0666
   slave {
     pcm "speakerbonnet"
     period_time 0
     period_size 1024
     buffer_size 8192
     rate 44100
     channels 2
   }
}

ctl.dmixer {
    type hw card 0
}

pcm.softvol {
    type softvol
    slave.pcm "dmixer"
    control.name "PCM"
    control.card 0
}

ctl.softvol {
    type hw card 0
}

pcm.!default {
    type             plug
    slave.pcm       "softvol"
}



5. Save the file as usual


Add Device Tree Overlay

1. Edit your Pi configuration file with
sudo nano /boot/config.txt
And scroll down to the bottom. If you see a line that says:
dtparam=audio=on 
2. Disable it by putting a # in front.


3. Then add:
dtoverlay=hifiberry-dac
dtoverlay=i2s-mmap


4. Save the file.

5. Reboot your Pi with:
sudo reboot


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