For this project, we will be building a two LED Matrix tall stereo audio spectrum visualizer driven by an Arduino Nano. We will basically be using four Bi-color (Red and Green) LED Matrix Driver Module kits from jolliFactory and two MSGEQ7 IC chips made by Mixed Signal Integration.
Two of the LED Matrix kits are for the audio left channel and another two for the audio right channel displays. This kit comes with all through-hole components and someone with basic soldering skill should be able to assemble it without much difficulty.
The MSGEQ7 IC is a single channel seven band Graphic Equalizer Display Filter. By feeding an audio signal to it, it will filter out seven frequency bands centred around 63Hz, 160Hz, 400Hz, 1,000Hz, 2,500Hz, 6,250Hz, and 16,000Hz.
Full detail on building this project can be found at http://www.instructables.com/id/Arduino-based-Bi-color-LED-Matrix-Audio-Spectrum-V/