http://liutaiomottola.com/myth/scroll.htm
"...typical violin scroll. When I (*HE*) copied Rabut’s scroll for the diagram above, I made use of a nice computer graphics algorithm for drawing approximations of scrolls by Taponecco and Alexa. Very simply, the algorithm approximates spirals by displaying them as tangent circular arcs, with their size relationships described by an arbitrary function. When I copied the violin scroll I did it using tangent 90° circular arcs of whatever size was needed to fit the section of the spiral I was working on. That the relationship of the lengths of the radii of these arcs could not be described by simple multiplication is a clear indication that the spiral of a typical violin scroll cannot be described by any logarithmic spiral. It is highly likely.... "

Trace 2D image of a good scroll using MoI arc cont command repetitively for short portions of the scroll...

ps (Myself) knows nothing about violins.

http://liutaiomottola.com/construction/Scroll.htm

http://www.gutenberg.org/ebooks/28252