LED Spectrum Analyzer plug-in for iTunes Version 3.0.7 - Intel Only for iTunes 10.4 and later [download] What is it? This is a free visualizer plug-in for iTunes 10.4 and later on Mac OS X 10.5 (Leopard) or later. What does it do? It creates a spectrum analyser display in the style of a typical hi-fi system, using bargraph displays that emulate LEDs or similar electronic display technology. The ba