Vojtech Vesely, known professionally as De Moi, is a Czech musician, sound artist, and record producer renowned for his innovative contributions to ambient music. He is recognized for his pioneering work in fusing long decaying tones, which led to the introduction of the concept of Drifting Intervals.

Born in South Moravia, Czechia, Vesely's musical journey was significantly influenced by a diverse array of musical philosophies and techniques. Drawing inspiration from the works of avant-garde composers like La Monte Young and experimental pioneers such as Terry Riley, Robert Fripp, and Pauline Olivieros, Vesely delved into the realms of drones, tape loops, and delays. This exploration culminated in the development of his concept known as Drifting Intervals—a technique characterized by the gradual fusion of multiple tones or intervals, creating a cohesive ambient texture. To illustrate the principle of Drifting Intervals, Vesely suggests imagining taking random notes and slowly rubbing them together.