In the case of our installation, we use a dilatant mixture of starch and water. At the right mixing ratio, this liquid solidifies even if low pressure is applied. In the cone of a subwoofer we can periodically apply pressure by playing a low-frequency sound. The substance alternates between solid and liquid and thus changes its state of matter approx. 30 times per second. Depending on the mixing ratio and the applied amplitude, frequency and waveform, the substance develops a dynamic neither attributable to the solid nor the liquid phase. It appears to have a mind of its own.