Boost Arduino Nano USB 5V to 12V
Using this DC Boost converter (XL6009E1) you can easily convert 5V from the Arduino Nano USB to 12V. This setup should come in handy to power the SID chip.
music
LM3915 VU Meter
Visualisation of sound gives an extra dimension in the experience of music. The LM3915 chip makes it possible to easily create a circuit that can accomplish this task.