Cocteau Twins were a Scottish alternative rock band active from 1979 to 1997, known for innovative instrumentation and atmospheric, non-lyrical vocals. The original members were Elizabeth Fraser (vocals), Robin Guthrie (guitar, drum machine) and Will Heggie (bass guitar), who was replaced by Simon Raymonde (also bass guitar) early in the band's career. Whilst the entire band earned much critical praise, Elizabeth Fraser's distinctive vocals received the most attention. At times barely decipherable, Fraser seemed to veer into glossolalia and mouth music. Allmusic reviewer Ned Raggett writes that "part of her appeal is how she can make hard-to-interpret lyrics so emotionally gripping."