Voice2STL

What is Voice2STL?

Voice2STL is a free browser tool that turns a short voice recording into a round soundwave ring you can 3D print. Instead of the usual straight waveform bar, it wraps a spectrogram of the clip around a circle: time runs once around the ring, low to high pitch runs from the inner edge to the outer edge, and the strength of the sound at each point sets the height. You pick a donut or heart outline, a diameter from 50 to 200 mm and a base from 1 to 5 mm, then upload a WAV clip. The site asks for 15 seconds or less.

A height amplification slider from 1.0 to 2.5 sets the contrast. Higher values push the quieter parts down so the loud syllables stand out as peaks. Peaks can reach a quarter of the diameter, so about 25 mm on a 100 mm ring. Everything runs in your browser through Python on WebAssembly, so the audio is not uploaded, and the STL downloads as soon as it is built.

There is no 3D preview and only WAV files are accepted, so MP3s and phone recordings need converting first. Clean clips with little background noise give the clearest pattern. It suits anyone turning a few spoken words into an anniversary, wedding or new-baby keepsake.

What you can make

• Donut-shaped voice soundwave rings
• Heart-shaped voice soundwave rings
• Desk ornaments from a spoken message
• Keepsakes of a baby's first words or a pet's bark
• Small keychains with a ring through the center hole

How to use Voice2STL

1. Save a clip of 15 seconds or less as a 16-bit WAV file
2. Open voice2stl.com and wait for the loading box to disappear and the Generate button to turn on
3. Pick Donut or Heart and set diameter, height amplification and base thickness
4. Upload the WAV and click Generate 3D Model; the STL downloads right away
5. Slice and print it, optionally with the maker's MakerWorld print profile