During the 1980s era, rhythm sections in some styles of pop took an increasing turn towards electronic instruments. A 1980s-era dance pop band might be backed up by a rhythm section of a synth bass, electronic drums (or drum machine) and various synthesizer keyboards. In some 1980s and 1990s bands, live human rhythm sections were sometimes replaced by sequenced MIDI synthesizer rhythm tracks made in the studio. In the 1980s and 1990s, the roots rock scene went in the opposite direction from dance pop; roots rock favoured traditional instruments in the rhythm section such as acoustic piano, acoustic guitar, mandolin, pedal steel guitar, acoustic bass guitar and upright bass. Another 1980s-era trend that helped revive interest in acoustic instruments was the "MTV Unplugged" style of performances, in which a rock band performs with acoustic instruments, including acoustic guitars and an acoustic bass guitar.