• 1
    Step 1

    These directions are written under the assumption that you will be following along with the original documentation - I purposefully leave out large chucks as they are already documented here:

    https://github.com/scottlawsonbc/audio-reactive-led-strip under the heading "Installation for Raspberry Pi"

    Install Raspbian on a SD card - I used Jesse Lite, which came with the 4.4 kernel.

    On the first boot:

     sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
    and add a network profile:
    network={
    ssid="MyWirelessAP"
    psk="MyWirelessPassword"
}
    then configure the hostname, and under Localisation Options, configure locale, language, and keyboard using raspi-config. Also, enable SSH
    sudo raspi-config

    SSHd hangs after authenticating until updating its config: https://expresshosting.net/ssh-hanging-authentication/

    sudo nano /etc/ssh/sshd_config
    And add this to the bottom
    IPQoS 0x00

    After a reboot, You should be able to SSH in and remotely perform the rest of the configuration

  • 2
    Step 2

    The Fe-Pi drivers are now included in the 4.9 kernel.

    From https://github.com/PiSupply/PaPiRus/issues/82, to upgrade to 4.9: 

    sudo apt-get update
sudo apt-get install rpi-update
sudo rpi-update

    After rebooting, disable the built-in sound chip and enable the Fe-Pi by editing /boot/config.txt

    (http://fe-pi.com/p/building-a-new-kernel?_ga=2.186172393.1565192209.1496548161-1555104412.1496548161)

    sudo nano /boot/config.txt
    Disable the built-in sound by changing this line:
    dtparam=audio=on

    to

    dtparam=audio=off

    Enable the Fe-Pi by adding these values to the bottom:

    dtoverlay=fe-pi-audio
dtoverlay=i2s-mmap

    Restart again and then proceed to the next step

  • 3
    Step 3

    Install the Audio Reactive pre-requisite software as described at Scott Lawson's github site: https://github.com/scottlawsonbc/audio-reactive-led-strip

    Skip the apt-get update if you updated in the prior step - no need to cause unneeded load on the Raspbian servers. 

    sudo apt-get install python-numpy python-scipy python-pyaudio

    Install ws281x library:

    sudo apt-get install build-essential python-dev git scons swig
git clone https://github.com/jgarff/rpi_ws281x.git
cd rpi_ws281x
scons
cd python
sudo python setup.py install

    The values given for the newly created /etc/asound.conf and edits to the /etc/asla.conf are from a system with two sound devices. In a prior step, the built-in sound was disabled, so the Fe-Pi is the only sound device that should be enabled, meaning that it should be device zero.

    In this case, the /etc/asound.conf should look like this:

    pcm.!default {
    type hw
    card 0
}
ctl.!default {
    type hw
    card 0
}
    and these two values in /usr/share/alsa/alsa.conf should equal 0, as show here:
    defaults.ctl.card 0
defaults.pcm.card 0

    While you are editing the alsa.conf, also update the following from:

    pcm.front cards.pcm.front
pcm.rear cards.pcm.rear
pcm.center_lfe cards.pcm.center_lfe
pcm.side cards.pcm.side
pcm.surround21 cards.pcm.surround21
pcm.surround40 cards.pcm.surround40
pcm.surround41 cards.pcm.surround41
pcm.surround50 cards.pcm.surround50
pcm.surround51 cards.pcm.surround51
pcm.surround71 cards.pcm.surround71
pcm.iec958 cards.pcm.iec958
pcm.hdmi cards.pcm.hdmi
pcm.modem cards.pcm.modem
pcm.phoneline cards.pcm.phoneline
    To this:
    pcm.front cards.pcm.default
pcm.rear cards.pcm.default
pcm.center_lfe cards.pcm.default
pcm.side cards.pcm.default
pcm.surround21 cards.pcm.default
pcm.surround40 cards.pcm.default
pcm.surround41 cards.pcm.default
pcm.surround50 cards.pcm.default
pcm.surround51 cards.pcm.default
pcm.surround71 cards.pcm.default
pcm.iec958 cards.pcm.default
pcm.hdmi cards.pcm.default
pcm.modem cards.pcm.default
pcm.phoneline cards.pcm.default

    Test the strip:

    Because the Fe-Pi is hardwired to use GPIO18, I am using GPIO12 to talk to the LED strip. The two figuration updates I made were to the LED_PIN and LED_COUNT.

    Edit the ~/rpi_ws281x/python/examples/strandtest.py file

    LED_COUNT      = 102     
LED_PIN        = 12

    try running the test:

    cd ~/rpi_ws281x/python/examples
sudo python strandtest.py