This is the title track from M. Mucci’s 2013 release put out on vinyl by Tall House Recording Co.. The distinctly medieval sounds accompanying M. Mucci’s guitar come from a Vielle, here performed by B. Grossman. The vielle is a stringed instrument somewhat resembling a violin but with five strings instead of four, and it was a popular instrument among troubadours and court musicians during the medieval period. In the 15th century the word began to be used when referring to a hurdy-gurdy which is also a stringed instrument but which is performed by a mechanical wheel turning against the strings instead of a human bowing them, in the case of the vielle.

M.Mucci has a Bandcamp page with lots more music, though I’m not sure if more medieval instruments make appearances.

Below is an image from the National Gallery in London depicting an angel playing the stringed instrument, likely painted by a contemporary of Da Vinci.