FretFitter is a calculator developed by Alan Shepherd and Gregor Bergmann to help builders, researchers and others to compare the fretting of historical clavichords with a large number of tunings and temperaments. It can also help to design, research and understand tunings and temperaments.

We welcome any feedback and critique that improves the performance of this tool.

We are grateful to Hans Eugen Frischknecht and Jakob Schmid to let us use their excellent “Stimmungslexikon”, hosted by the BDO here https://bund-deutscher-orgelbaumeister.de/stimmungen/

Visit https://ashepherd.eu to learn more about Alan’s work.