Rhine Harp: an instrument string is strung and tuned on a slightly bowed wooden stick. The current of the water causes the string to vibrate. This is recorded and made audible through a contact microphone placed on the stick.
Wind in a Cornfield: the dry rustling and tapping of cornstalks in the field during light summer wind.
Rhine Sounds: the murmur and splashing of the Rhine over small embankments during shallow summer water levels