The Signature Series by producer Paolo Pietropaolo (host of In Concert on CBC Radio 2) and co-producer Denise Ball is a music program that explores the personality behind key signatures of music by personifying each of the 24 keys as a person.
In 2013, Pietropaolo won the Prix Italia in the category of best work for music for the program.
Each key has an image, with its name, its nickname, and a person (or bird, in the case of C minor) whose personality is representative of that key on it, except for C major, whose picture is that of the sky and the sea, with no people featured.
The last episode, called "C major: The Final Key", was released online on 22 October 2013.
On SoundCloud, there are sets to categorise the keys according to number of sharps or flats and their tonality (major and minor).