How to make a 3D-printed soundwave keychain

A soundwave keychain is a voice, a laugh or a favourite song turned into a shape you can carry. The Glowtrack Studio soundwave art maker reads your audio, draws its waveform as bars and turns it into a ready-to-print STL — keychain with a ring loop, or a plaque with the wave raised on a base.

Make a soundwave STL free →

Good recordings to use

Short phrases: “I love you”, a name, a baby’s first word or a laugh — two to five seconds gives a clear, recognisable shape.
Songs: pick the chorus or the first line rather than the whole track, so each bar is distinct.
Clean audio: background noise fills the gaps between words. Trim it out with the start and end sliders.

Print settings that work

Material: PLA or PETG. The model lies flat and needs no supports.
Layers: 0.2 mm layers, 3–4 walls, 20% infill or more — keychains are small, so 100% infill is fine too.
Thickness: 3 mm or more for a keychain that survives a pocket; the ring loop should be at least as thick as the body.
Two colours: choose the plaque, then add a filament change in your slicer at the base thickness shown in the tool — the wave prints in the second colour.

Step by step

Open the Glowtrack Studio soundwave art maker and drop in your recording (MP3, WAV, M4A or a voice memo).
Use the start and end sliders to keep just the words or the part of the song that matters.
Switch to the 3D print tab and choose Keychain or Plaque. Set the length, wave height and thickness in millimetres.
Drag the preview to check it from every angle, then download the STL.
Open the STL in PrusaSlicer, Bambu Studio, Cura or any slicer, slice it flat on the bed and print.

Make a soundwave STL free →

Questions

What size should the keychain be?

About 70–100 mm long and 20–25 mm tall works well on a key ring. Shorter clips (a word or two) look best at the smaller end.

Is the STL watertight?

Yes. The model is generated as a single closed solid (the plaque as two touching solids), so slicers open it without repair.

Can I make a poster instead?

Yes — the same tool makes print-ready soundwave posters as PNG or SVG, with your title and date underneath.