After the panel backboard is completed, the violin still involves a lot of fine woodworking work and painting.  

The next stage in which physics can play a role is' setting '.  

This includes shaping the fingerboard and piano code, assembling the sound column, adjusting the string plate, and so on. The final product pronunciation will mostly be determined at this stage.  

The code of an instrument conveys the vibration from the strings to the panel.  

In a sense, it can be seen as an audio filter.  

Its traditional and complex shape is most likely derived from the aesthetics seen by the eyes and the sound heard by the ears, which have been improved through repeated experimentation.  

The survey on which piano codes sound good suggests that an experiment similar to the tuning technique used for free boards can be conducted.  

A high-power tweeter and audio signal generator can reveal that the best piano code has a simple bending eigenmode with a pitch of F (2800 Hz).  

For the complete instrument with strings installed at the end, its vibration mode can be investigated and adjusted.