I am sometimes asked to tune harpsichords, clavichords and fortepianos for concerts, and the information provided to me may simply be a list of comma and/or cent values that I can “put into my tuning machine”. As I prefer to tune by ear, I needed a convenient way of turning those lists into a recipe of beats, and this is what first inspired me to create Eartune. I later added some extras like graphs and a virtual keyboard, which enable me to explore the various temperaments in more depth. I believe that Eartune could prove useful to other people, so I have decided to make it publicly available via this website.