OLED Display as Audio Spectrum Visualiser for Teensy 3.2

Turns a standard I2C OLED display into an audio spectrum visualiser! Audio signal is connected via a USB connection to the Teensy but can be easily modified for analog input. The Teensy displays the audio following FFT analysis using 128 bands from a mono signal. 

Code is here: https://github.com/little-scale/arduino-sketches/blob/master/OLED_FFT.ino 

Beautiful little OLED spectrum visualiser ✨ pic.twitter.com/TODDgyt0DJ

— little-scale (@littlescale) June 8, 2022