One of [Dooievriend]'s friends recently pressed him into service to write software for a spectrum analyzer/VU that he made. The VU is a fairly complex build: it's made up of 1280 LEDs in a .
Spectrum Analyzer, Tv Tuner, Usb, Radios, Software
In this Instructable I am going to show how to make a program in Processing that analyzes sound on your computer and sends data to an Arduino that controls an LED.
Agilent/HP/Keysight 3588A Spectrum Analyzer #AgilentHP