(b Gifu, 1966). Japanese electronic composer and sound artist, active also in France. He is best known for composing reductionist sounds of extreme frequencies, employing sine waves, electronic sounds, and white noise; these are often presented as ambient soundscapes in immersive installations made of light and/or projected visualizations of data. Ikeda originally trained in Japan as an economist. He began composing music in the 1990s, focusing on Minimalism with a curiosity for the duality of mathematics, specifically the binary patterns of 0s and 1s of digital software. His compositions continued the investigations of John Cage and Morton Feldman in exploring the potential differences between tones. Ikeda’s initial albums were +/- (1996) and 0°C (1998), which resonated with the glitch electronic scene emerging at that time. In 2000 Ikeda’s album Matrix, on the Touch label, attracted considerable attention as an interactive electronic work. Ikeda presented ten 5-minute long tones affected by the listener’s proximity. These were followed by a second series of tones made from orchestral instruments to produce overlapping sounds. The album explored time and tone and generated a wider discussion in the music industry about the relationship between sound and new media formats. Ikeda later produced the albums ...