Harry Yeff, also known as Reeps100, is a London-born, neurodivergent artist and technologist specialising in voice, AI and technology-based performance. For over fifteen years, Yeff has been visualising the voice and is globally recognised as a leading figure in voice-technology experimentation. His performative installations and machine-like vocal ability have attracted a worldwide following, amassing over 100 million views online.

Yeff has exhibited internationally at leading museums, festivals and design weeks including the Museum of Arts and Design (New York), Tate Britain (London), Art Basel Miami, the Sundance Film Festival and Davos. His live performances and talks have featured at Google Exec, the United Nations, SXSW, Glastonbury and TED, where his voice-driven performances continue to redefine what it means to communicate and create with technology.

Yeff’s practice centres on the human voice as both medium and data, using advanced technologies to extend its expressive and sculptural potential. His work explores the evolving relationship between humans and intelligent machines, transforming sound into visual form and performance into digital artefact. Through AI collaboration, he examines identity, empathy and the boundaries of self-expression in the age of synthetic media.

In Second Self, Yeff interacts with an AI-trained vocal twin that responds and improvises in real time, creating a live dialogue between human and machine. His ongoing project, VOICE GEMS, transforms recorded voices into intricate digital gemstones, preserving moments of emotion, memory and human connection. Together, these works form a growing archive of voice-based artworks that blur the lines between performance, sculpture and data visualisation.

Building on his history of pioneering human–machine performance, Yeff co-directed FUSION, an AI-driven international ballet with Leipzig Opera House, which brought together dancers, algorithms and voice in a groundbreaking exploration of collective expression.

Yeff has completed three artist residencies at Harvard University, is a Culture Leader at the World Economic Forum, and joined the legendary Experiments in Art and Technology (E.A.T.) programme at Bell Labs, following in the footsteps of John Cage and Robert Rauschenberg. He has also held artist-in-residence positions at Pioneer Works, Factory Berlin and Sónar +D Barcelona, and received the Arts and Science Breakthrough Award from the Falling Walls Foundation for his pioneering work in voice and technology.

Yeff works from London and is currently the Founding Artist in Research at Eleven Labs and Curator of the AI Visionary Initiative at the International Telecommunication Union (ITU) and the United Nations, seeking artists who represent the bleeding edge of human and machine collaboration.