Prototype to next print
Flute Tuner & CAD Corrector
Hear the fundamental and each scale note automatically. Then turn a stable reading into one clear chamber-length or finger-hole change for the next 3D print.
Measure a physical prototype, then revise the model.
A microphone cannot verify an unprinted CAD file. Warm the flute, use a steady normal breath, and repeat the reading before changing a production model.
2 · Automatic note recognition
Nothing is uploaded or recorded.
Playing now
Sounding fingering
Next note:
3 · CAD revision
Change one dimension
Hold a warm flute at normal breath until the stability bar fills. The tuner uses the stable median, not a single wavering frame.
What the math does
Pitch is tracked with a normalized square-difference method, parabolic peak interpolation, clarity scoring, and a temporal median. Chamber correction uses the effective half-wavelength at your workshop environment. Hole correction inverts the builder’s cylindrical tone-hole model while preserving either center or diameter.
What still moves pitch
Breath pressure, block seal, bore temperature, leakage, printer scale, circular-hole error, surface roughness, and voicing all matter. Use repeatable breath and several readings; treat the result as a next-print estimate, not a one-print guarantee.
Research foundations: McLeod & Wyvill’s pitch estimator, Cheveigné & Kawahara’s YIN method, Cramer’s moist-air sound-speed correlation, and published impedance/transfer-matrix woodwind design research. Pitch method · YIN · Woodwind optimization