Trisomie 21 is a French coldwave/post-punk band that was founded in 1981. Their album 'Chapter IV' is considered a classic in the genre and is being talked about due to the upcoming concerts of the band in Moscow and St. Petersburg. The album is known for its monotonous compositions and detached vocals, which are characteristic of the coldwave genre. The 'Remix' version of the album was released a year after the original release due to some recording issues.