12-Hole Alto C Transverse Ocarina

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Bounding box: 119.9 × 54.0 × 46.0 mm
Engine: 3D Printing B-rep
Parameters: 26
Published: November 10, 2026

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The prompt

"Create a 3D printable 12-hole transverse ocarina tuned to the Key of C (Alto C). The main body should be an ergonomic, smooth teardrop/ellipsoidal chamber about 120 mm long with an internal cavity volume of roughly 115 cubic cm and a 3 mm wall thickness. At the beak end (X = 110 mm), include a rectangular voicing window measuring 10 mm by 1 mm with a sharp 30-degree internal labium cutting edge. On the top and bottom surfaces, generate 10 precision cylindrical finger holes and thumb sub-holes ranging from 2.5 mm to 5.8 mm in diameter, positioned along a longitudinal centerline. Export the final output as an STL file for 3D printing."

Parameters

Name	Value	Range
Overall body length	120 mm	80 – 200
Body width	54 mm	30 – 100
Body height	46 mm	24 – 100
Wall thickness	3 mm	1.2 – 6
Beak-end X position	110 mm	80 – 160
Voicing window length	10 mm	5 – 20
Voicing window width	1 mm	0.8 – 3
Voicing window centre X	100 mm	80 – 110
Internal labium angle	30 deg	15 – 45
Labium ramp length	8 mm	3 – 12
X of first top finger hole	-5 mm	-10 – 10
Spacing between top finger holes	10 mm	6 – 15
Top hole 1 diameter	2.5 mm	2.5 – 5.8
Top hole 2 diameter	2.9 mm	2.5 – 5.8
Top hole 3 diameter	3.2 mm	2.5 – 5.8
Top hole 4 diameter	3.6 mm	2.5 – 5.8
Top hole 5 diameter	4 mm	2.5 – 5.8
Top hole 6 diameter	4.4 mm	2.5 – 5.8
Top hole 7 diameter	4.8 mm	2.5 – 5.8
Top hole 8 diameter	5.2 mm	2.5 – 5.8
Top hole 9 diameter	5.5 mm	2.5 – 5.8
Top hole 10 diameter	5.8 mm	2.5 – 5.8
Thumb hole 1 X position	25 mm	0 – 90
Thumb hole 1 diameter	3 mm	2.5 – 5.8
Thumb hole 2 X position	45 mm	0 – 90
Thumb hole 2 diameter	3.6 mm	2.5 – 5.8

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.

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