The17 is a choir. It writes and performs improvised music scores and does not make recordings of its performances. Anyone who wants to can become a member of The17 by joining a performance on its UK Coast-to-Coast or World City-to-City tours. The17 was founded by Bill Drummond as a development of his interest in choral music, after hearing the music of Arvo Pärt. It also follows Drummond's belief that "all recorded music has run its course" and that music should be a performed art form, "celebrating time, place and occasion and nothing to do with something trapped in the iPod in your pocket".
The principal tenets of The17 are stated on Penkiln Burn Notices created by Bill Drummond. These notices, along with approximately 400 composed scores for The17, are freely available for viewing, downloading and printing on a website dedicated to The17. The website also contains news about upcoming performances and images of Drummond's graffiti carried out in the name of the choir.:
Drummond states that he thought of the name immediately. It has origins in his love of Prime numbers, and his idea of the seventeenth year as a stage of life between the "sweet, coy" sixteen and the full adulthood of eighteen. It is also a play on the name of The Sixteen, a professional choir admired by him. While the first performance of The17 was carried out by 17 men in a studio in Leicester, the name no longer dictates the number of choir members for a performance; scores may be performed by hundreds of voices or none.
The choir's ethos derives from Drummond's disillusionment with recorded music. He released a manifesto calling on people to "dispense with all previous forms of music and music-making and start again".
Each performance has no audience and is never recorded. Also, there is no sheet music; instead the choir performs according to instructions written by Drummond or other choir members. These instructions (called "scores," but bearing little relation to musical scores) are open to change over time, and exist in the public domain.