Realtime Audio Visualization and Fast Fourier transform

Description

A Realtime Audio Visualization in Python using a Raspberrypi a Sense HAT and a USB microphone. On this script i use a USB microphone to get the audio, then calculate Fast Fourier transform to represent in the 8 x 8 RGB LED matrix,

The Sense Hat is an add-on board for Raspberry Pi, made especially for the Astro Pi mission. The Sense HAT has an 8×8 RGB LED matrix, a five-button joystick and includes the following sensors:

Gyroscope
Accelerometer
Magnetometer
Temperature
Barometric pressure
Humidity

Instalation

git clone https://github.com/rfiestas/audio_visualization_fft.git

also:

sense-hat, python module to control the Raspberry Pi Sense HAT.
alsa audio, provides audio and MIDI functionality to the Linux operating system.
colour, converts and manipulates various color representation (HSL, RVB, web, X11, ...).
numphy, is the fundamental package for scientific computing with Python.

Usage

Launch this script with any root rights user, Press Contol + C, to stop script.

audio_visualization_ttf.py

Show sound cards.

# ./audio_visualization_fft.py --show-cards

Select sound card.

# ./audio_visualization_fft.py --card Device

Notes:

Alsa Audio need libasound2-dev

Troubleshooting:

I can't change setperiodsize, It's automatically calculated, based on rate and numbers of chanels. it's neccessary get a data lenght multiple of 8, to represent in the screen.