Winter by Vivaldi (The Four Seasons) played on a Nyckelharpa by Erik Rydvall & the Drottningholm Baroque Ensemble

Nyckelharpa is a traditional Swedish instrument somewhat similar to violin, but more like a hurdy-gurdy which has a series of keys to actuate the notes.

As a builder, I am extremely intimidated by the complexity of both instruments on account of all the friggin keys.