Mujitsu and Tairaku's Shakuhachi BBQ

we want to 3d print of a shakuhachi with precision measured and copied from ancient very important shakuhachi bore but we want to print the body with internal structures natural or better for bamboo sound vibration . What are the options ? fdm is best

What matters most for shakuhachi sound
A shakuhachi is extremely sensitive to:
Bore diameter changes down to 0.1 mm
Internal wall stiffness and damping
Mass distribution along the tube
Surface texture inside the bore
Node/anti-node behavior influenced by micro-resonant structure of bamboo

A bamboo shakuhachi is not just a smooth tube ? the inner wall has:
natural fibers
tiny ridges
longitudinal grain
varying density
These subtly shape the formants and brightness.

A perfect plastic tube with the right shape will play, but won?t sound ?bamboo?.

So the job is:
Copy ancient bore measurements perfectly
Add internal microstructures that mimic bamboo?s acoustic impedance

Why FDM is actually excellent for shakuhachi
FDM naturally creates:
layer lines (longitudinal or spiral)
variable wall thickness
anisotropic stiffness

These properties accidentally resemble bamboo.
But they must be controlled, not random.

FDM gives you:
Stiff outer shell
Fibrous internal walls
Option for custom infill patterns that behave like bamboo nodes

This makes FDM better than resin for musical instruments.

Local wall structures that mimic bamboo (very important)
Natural bamboo ?fiber? imitation (best choice)
Printed along the tube length:
Print upright, single perimeter, spiral vase mode + 100% flow
Produces:
continuous helix grain
micro-ridges that behave like bamboo fibers
light but stiff tube

This gives the closest acoustic behavior to bamboo.