"The band is notoriously reclusive; providing rare and enigmatic interviews, using life size mannequins and robots to conduct official photo shoots, refusing to accept mail and not allowing visitors at the Kling Klang Studio. [...] anyone trying to contact the band for collaboration would be told the studio telephone did not have a ringer, since during recording, the band did not like to hear any kind of noise pollution. Instead, callers were instructed to phone the studio precisely at a certain time, whereupon the phone would be answered by Ralf Hutter, despite never hearing the phone ring."