brunodimarco / ledvis

Led music visualizer experiment

ledvis

Raspberry Pi LED music visualizer. Use screen -c pi.screenrc to run.

sudo is needed because this we are interfacing with the GPIO and PWM through the rpi_ws281x library.

Requirments

This is meant to run on a Raspberry Pi. I used a Model 3 B+.

• rpi_ws281x
• adafruit-ads1x15
• screen
• Flask

Run this to install the rpi_ws281x (LED) driver library

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

And run this to install the other dependencies

pip install adafruit-ads1x15	# install the ADS1015 i2c library
pip3 install Flask				# get Flask (best to use python3)
sudo apt install screen 		# get screen

Repo Organization

• run.py contains execture three processes: one to sample the ADC, one to process the data, and one to write to the LEDs
• visualizer.py contains classes the define how to process a sample array into color values to be displayed
• sound_processing.py contains functions for normalizing and smoothing the incoming audio signal
• masker.py contains functions for create a color mask given an amplitude (used in VooMeter in visualizer.py)
• config.py does what is sounds like it does

To get it to run automatically on the Pi

Install screen by sudo apt install screen. dd the following to /etc/rc.local right above the exit 0 line

su - pi -c "screen -dm -S ledvis -c /home/pi/ledvis/pi.screenrc"