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A colour is assigned by a visual and auditives color system to each clay/tone (tone color). Thus two different sensory stimuli are combined. The twelve-scale divides the audible Oktave into 12 clay/tone stages - similar to the twelve-clay/tone color circle, which divides the visible color into 12 color stages. The Symphonic Lines reflect tones/instruments and clarify that from the mutual acoustic overlay of the individual tones/instruments the sounding body of the "Bochumer Symphoniker" result.