Thanks for sending this blog tip in Abraham Casas! Via Youtube!
Paper circuit version of a VGM player using a SN76489 sound chip (the one used in Master System and Game Gear), a 3.579545 MHz clock, a lilypad arduino and painted SEGA letters that show up using 4 UV LEDs.
This is not emulated sound. It is the same that could be heard with the original Master System and Game Gear.
Source: Adafruit – Arduino