Running through the book like a bassline is a twelve-hour conversation between the musicianFM Einheit (FME) and media archaeologist Siegfried Zielinski. The volume is an exploration of theworld of sound in the form of a playful dialogue. In his responses, FME uses language to createthe characteristic echo that constitutes his universe of sounds, tones, noises, and music. At thesame time his expatiations also resonate in the echo chamber of the statements, poetic textsquotations, and essays of fellow artists, musicians, critics, and media and cultural researchers. Thebook's numerous images and graphic gestures make it clear that the bands FME has developedhis musical identity with are always involved too with artistic, sculptural, architectural, andscenographic projects.FM Einheit is a musician, composer, and sound researcher and the drummer with the band Einstü rzende Neubauten, which he also co-founded. Siegfried Zielinski helped devise the concept ofmedia archaeology and is passionate about researching the dynamic relationships between artscience, and technology. Daniel Irrgang is a scholar of media, art, and culture, currently basedat the University of Copenhagen.