An electric grand piano is a particular type of piano manufactured and marketed by Yamaha, Kawai and Helpinstill during the 1970s and 1980s, although experimental instruments of similar type were made as early as the late 1920s. The other versions of Electric Piano did not use strings; the Wurlitzer Electric used by Ray Charles to record "What'd I Say" uses hammer-struck reeds, while the Fender Rhodes uses metal tubes called tines.