Brainwaves - The Unexplainable Store® provides 80+ free samples and high quality brainwave entrainment recordings. It is The Ultimate Brainwave Entrainment App on the Android Market! The Unexplainable Store® has been providing brainwave entrainment since the year 2000. The files are rather large to preserve up-most quality, so please be patient when downloading. Professionally built Isochronic Tones with high sound quality. 80+ brainwave recordings bring you to altered state of mind.