Do you remember back when electronics came in clear cases? Back around the turn of the millennium, when translucency was chic. [3DSage] sure does, which is why he went to great lengths to make a clear case for his Clear Retro Music Sequencer.The sequencer itself is based around an ESP32-S3 module with a built-in display, and a rotary encoder that handles most of the input. Most, because there’s a second button and a stylophone-like array of brass rods on one edge of the custom PCB he made with his fiber laser that can also handle note input. Other notable features include a phono jack with built-in switching so the tunes come out automatically from headphones or the internal speaker, and a AAA battery-lookalike. It’s a small detail, but that 666 mWh 3.7 V lithium cell is the demon’s meow for this project, seeing as it gives the convenience of a modern battery without compromising that Y2K look — remember you can see the battery through the translucent case.About that translucent case: it’s 3D printed out of PETG, with settings similar to those we’ve reported on before: hot, slow, and don’t cross the streams! Which is to say every layer must line up with the one above. Oh, use filament fresh out of the drier of you live somewhere as humid as [3DSage]. The result is not totally see-through, but an application of clear enamel fills in the surface well enough to read through, giving the vintage look [3DSage] was after. To complete that Y2K feel, he turns the device into a slap bracelet, because why not? For those of you who missed due to the aforementioned federal prison arc, slap-on wristbands were all the rage amongst the kids back in those days.The wristband is a length of measuring tape at its core, the springy steel having been cold-worked to hold the radius of [3DSage]’s wrist in its relaxed state, encapsulated in clear gorilla tape for comfort. We probably don’t have to tell you that getting slapped with a raw tape measure isn’t the nicest. For the actual operation of the sequencer, check out the video embedded below — the first 9 minutes cover the build, while the rest shows off the product.Of course you don’t need an ESP32 for this kind of music maker– you can do it with a C64, or even discrete parts and rope-core memory.