Music Visualization with an Arduino - mcclanahoochie's blog
File:DIY Arduino LED screen for audio spectrum analyzer 2.jpg - Wikimedia Commons
New Arduino Project: Spectrum Analyzer? -
Arduino Spectrum Analyzer - Elmwood Electronics
Arduino Realtime Audio Spectrum Analyzer with Video out! Arduino Realtime Audio Spectrum Analyzer with Video out! Arduino Realtime Audio Spectrum Analyzer with Video out! | Arduino Blog
Spectrum Analyzer Using Winamp and Arduino Uno - Hackster.io
Holding Focus: Arduino Realtime Audio Spectrum Analyzer with Video out!