The LED meter is a rare mod that is used by only the most daring (read: can kill a parallel port) or well funded case modders. This mod uses the printer port to transmit data to an array of 8 LEDs, making them do whatever the user can find or write a program for. From WinAmp sound movement to system use, the possibilities are limitless. This guide will show you how to make an affordable and safe meter so you to can have one of the most visually entertaining mods on the market. The most common application of the LED meter is for WinAmp. Using a visualization plugin, music output can be displayed on the meter in 2 different ways- Boom indication (vertical meter), which indicates parts of the music rich in bass or when all the instruments hit a beat at once, and Music illustration (horizontal meter), which is the same effect as the equalizer visualization, only on your LED meter in your case. The meter can also display various system usages from CPU time to network usage to CPU temp.