Pure Sound created with a different algorithm that provides the distribution commonly called pink noise, also used as a logarithmic sound reference calibrator and therapeutic sound. Sounds like distant ocean waves. This CD is the best replacement for so-called white-noise used for therapeutic purposes because of its logarithmic distribution, which is heard as evenly distributed. However, it is not noise at all, but a perfect 3.1dB/octave phase distribution of sine waves at whole number ratios of the Great Diesis.