audio
Audio Spectrum Analyzer in Python (a waveform viewer)
https://www.youtube.com/watch?v=AShHJdSIxkY
Audio Visulization
32-Band Audio Spectrum Visualizer using Raspberry Pi 3
https://www.raspberrypi.org/forums/viewtopic.php?t=186173
8x8 MAX-7219 Dot Matrix:
https://www.amazon.com/WMYCONGCONG-MAX7219-Display-Arduino-Microcontroller/dp/B07FT6MZ7R/ref=asc_df_B07FT6MZ7R/?tag=hyprod-20&linkCode=df0&hvadid=295668195801&hvpos=1o2&hvnetw=g&hvrand=1838390105890889719&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032179&hvtargid=pla-528229147177&psc=1
Cube
LED Cube, http://ozzmaker.com/raspberry-pi-3-plus-rgb-led-cube-cava-awesome-audio-visualiser/
Raspberry Pi 3, https://www.raspberrypi.org/products/raspberry-pi-3-model-b/
cava Spectrum Analyzer, https://github.com/karlstav/cava
light show pi, http://lightshowpi.org/