Vibrating strings lie at the heart of many musical traditions and form the basis of instruments such as classical guitar, electric guitar, viola campaniça, and viola braguesa. In String Theory, these instruments come together in a concert that begins with familiar gestures – plucking, repeating, resonating – to explore the full range of a string’s sound. Moving between pieces closer to the world of the guitar and other moments of greater suspension and listening, the programme offers a journey where different eras, techniques, and sounds intersect, demonstrating how a simple idea – a vibrating string – can give rise to a wide variety of musical forms.