The Roland TR-808 drum machine was released in 1980, defining early electro with its immediately recognizable sound. Staccato, percussive drumbeats tended to dominate electro, almost exclusively provided by the TR-808. As an inexpensive way of producing a drum sound, the TR-808 caught on quickly with the producers of early electro because of the ability of its bass drum to generate extreme low-frequencies. This aspect of the Roland TR-808 was especially appealing to producers who would test drive their tracks in nightclubs (like NYC's Funhouse), where the bass drum sound was essential for a record's success. Its unique percussion sounds like handclaps, open and closed high-hat, clave and cowbell became integral to the electro sound. A number of popular songs in the early 1980s employed the TR-808, including Marvin Gaye's “Sexual Healing,” Cybotron's “Clear,” and Afrika Bambaataa's “Planet Rock.” The Roland TR-808 has attained iconic status, eventually being used on more hits than any other drum machine. Through the use of samples, the Roland TR-808 remains popular in electro and other genres to the present day.