Open Mouthpiece

What is Open Mouthpiece?

Open Mouthpiece designs saxophone mouthpieces in the browser. You start from a preset for soprano, alto, tenor or baritone, each in three variants, or a C-melody, and change it in saxophone terms: tip opening in thousandths of an inch, facing length and curve, rails, table, chamber, baffle, window, body and beak. Readouts show the tip, facing length, total length, inside air volume and thinnest wall, and side and cross-section charts let you drag the facing and the outline.

A Fit section sets your neck cork diameter and how tight the mouthpiece should sit, with test rings at three squeeze levels to print first. The app can also build a matching ring ligature and a cap, put text or pictures on the body, add rings, flutes or knurling to the shank, and compare your design with a preset or an STL of a mouthpiece you own. Downloads are the mouthpiece STL oriented for printing, the ligature and cap STLs, a .scad design file and a check card with numbers to measure, or all of it as one zip. The printing guide suggests 0.08 to 0.12 mm layers on FDM in PETG or PLA for testing, or a tough biocompatible resin.

It is free with no ads and no account, works on phones too, and sends anonymous usage counts that you can switch off in the settings. The code is GPL-3.0, and the README says the STLs you export and the objects you print are yours to use, share or sell. The project says it was written by an AI model directed by a saxophonist, and that the alto, tenor and baritone presets have been printed and played. It suits sax players who want to try different tip openings and chambers at the cost of some filament.

What you can make

• Saxophone mouthpieces from soprano to baritone
• Matching ring ligatures and caps
• Neck cork test rings
• Mouthpieces with lettering or a knurled shank

How to use Open Mouthpiece

1. Pick your saxophone and a preset
2. Adjust the tip opening, facing, chamber and baffle
3. Print the shank test rings to check the cork fit
4. Download the mouthpiece STL and print it standing on the neck end