The group was formed on 2nd September 1990 by P.Jambor and M.Misik and was originally called NOTORICA. The group was completed in November of the same year by M. Kadak and J. Kotlar/ex-vocals,guitar/In the beginning Notorica played thrash metal. In this style they also produced the first demo-tape called " The world of violence" on 14th April 1991. However, the group was gradually changing their primary style. The members of the band concentrated on the technical execution of their music. They changed their vocalist, and the bass player M. Misik started to sing. The second demo-tape called "The Decay" was recorded on 2nd September 1991. This demo was in the techno-thrash style except M. Misik s death metal vocals.The following 3rd demo-tape called "Apocalypse has the stage" was recorded on 15th March 1992, in the Exponent studios. The recording quality of this demo-tape was much better than the previous two ones. This demo can be characterised as thrash-death metal and it represents the crystalisation of their musical style. In the autumn 1992 the guitar player J. Kotlar left the band and it can be said that the thrash metal feelings too. The remaining members insulated in a village hall for half a year and formed their own musical style. The results of this appeared on the demo-tape "Uncomprehensibility". With the creation of the song for this demo, the band came away from American death metal, which was utilized as a bounce board for the creation of their specific musical direction. Demo was recorded in the beginning of December 1992 in the Exponent studios. In February 1993 the band went on tour - "Uncomprehensible tour 1993". The group found their new guitar player V.Mitunik/ex-guitar/ on one of the concerts. The original name of the group - NOTORICA - expressed no longer the philosophy of its members. Therefore the name was changed to DISSONANCE / which means disharmony in music /. The demo "Uncomprehensibility" obtained good reviews in the specialized magazines and positive reactions of the fans. Two songs from this demo were chosen and recorded on the sampler "NECROMETAL 1", by the recording studios Jupiter. In May 1993 the group was offered to record its debut-album "Look To Forget". The album was successfuly recorded in the studios of the Slovak Radio in September 1993. It used material from the demo "Uncomprehensibility" and other new techno-death compositions. The lyrics analyses the psychology of a man his life driven into a life or death situations. The album went off as for year-end 1994.