In this tutorial I'm going to show you how to make LED Spectrum with arduino.
First make this LED Matrix for Arduino. https://www.instructables.com/id/Arduino-LED-Scrolling-Text-Simple-Easy/
Use the Code on this Instructable below and upload it to arduino.(fixx_ftt files are the libraries)
Connect the Audio out of the music playing device to arduino Analog pin A0.
Make a comment thank you.