This stunning piece of art is [Emily Velasco’s] take on the Atari Punk Console. It’s a freeform circuit that synthesizes sound using 555 timers. The circuit has been around for a long time ...

Forrest Mims in 1980 and originally simply named “Sound Synthesizer”, the circuit gained it’s more recent popularity when re-dubbed the “Atari Punk Console” by Kaustic Machines.

Instructables is great, don't get us wrong, but if you're just looking for a sweet new Arduino project or a super-charged Atari Punk Console ... user-uploaded circuit diagrams to get you started ...

Let’s ask our friend Wikipedia: “An Atari Punk Console (commonly shortened to APC) is a simple DIY noisemaker circuit that is relatively inexpensive and easy to build.” Ah, sounds cool!