The app might support your relaxation, such as good sleep, meditation, etc. You can change the soundscape by yourself. /_/ Main function _/_/. / rain drops _/. Volume. Interval. Volume, interval changes at random on the basis of the set value. Delay Time. Delay Level. / RAIN and WIND _/. Volume. Distance. Swell Time. /_/ Other function _/_/. Playback in the background.