From the 1960s it starts to happen the electrification of the "coladeira", in which the percussion instruments are replaced by a drum kit and the bass / accompaniment play performed in the guitar is replaced by a bass guitar and an electric guitar. From the 1980s there is a big scale usage of electronic instruments (synthesizers, drum machines), being that usage much appreciated by some and criticized by others. In the late 1990s there is a comeback to the roots where unplugged (acoustic) performances are sought after again.