 Another instrument, the Gravi-kora, a 21 string electro-acoustic instrument, was later developed by Robert Grawi especially for kora players who wanted a modern instrument.Its playing and tuning are the same as the traditional kora.The gravi-kora has been adopted by kora players such as Daniel Berkman, Jacques Burtin, and Foday Musa Suso, who featured it in recordings with jazz innovator Herbie Hancock, with his band "Mandingo", and on Suso's "New World Power" album.