The historical instruments are not so standardized like the modern violins. There are differences in the construction that affect the sound and a variety of accessories. The viols have a big variety in forms, beginning at the bodies and ending at the rich decorations.
The instruments are based on the forms of the old masters, like Nicoló Amati or Henry Jaye at the viols. After the proportions they used, a technical drawing is made to plan the new instrument.
Acoustic methods, suitable for workshops, like the Chladni method, are used to make sure to get to a good sound.
Individual demands, like string height ore bridge form, are considered for the final adjustment of the