Problem: Nightwish is a symphonic metal band from Kitee, Finland. The band was formed in 1996 by lead songwriter and keyboardist Tuomas Holopainen, guitarist Emppu Vuorinen, and former lead singer Tarja Turunen. The band soon picked up drummer Jukka Nevalainen, and then bassist Sami Vanska after the release of their debut album, Angels Fall First (1997). In 2001, Vanska was replaced by Marco Hietala, who also took over the male vocalist role previously filled by Holopainen or guest singers.

Earlier Nightwish performs symphonic metal with soaring female operatic vocals. Their music has been described as "bombastic heavy, symphonic and cinematic, with keyboards and strings creating a gothic atmosphere". They have also been known to play power metal and gothic metal. The band's music is also known to be complex and layered. Their approach is epic, theatrical and operatic. Critic Chad Bowar notes that the music is "always very melodic with memorable choruses and a lot of hooks." The usage of a female vocalist has become a sort of trademark, though less so since the outbreak of new female fronted metal bands in the mid-2000s with the popularization of bands such as Evanescence and Leaves' Eyes as well as several gothic metal bands mixing female and male vocals, such as Lacuna Coil, Tristania, Epica and the early Within Temptation. Bassist and vocalist Marco Hietala describes the style of the band's music as "melodic symphonic metal;" though this is not a view shared by all members of the group, including band composer Tuomas Holopainen, who describes the band as simply symphonic metal. Some critics find that the band had a gothic sound since their debut. The music of Nightwish had been "distinguished by the operatic voice" of soprano Tarja Turunen, a "charismatic frontwoman with a powerful voice". Critics observed that her vocals became less operatic with the release of Once. Following the departure of Tarja Turunen from the group, Nightwish left behind the "signature operatic vocals" of their earlier albums. While the music of Nightwish is centered around a female lead singer, the band has also featured some male vocals on their albums ever since their debut release Angels Fall First. This debut album also included "elements of folk music and ambience" that were discarded on their subsequent album Oceanborn. However, the song "Creek Mary's Blood" from the album "Once" featured some use of folk-oriented Native American melodies, and their 2007 release Dark Passion Play featured folk music elements on the songs "The Islander" and "Last of the Wilds".

Who influenced their style?

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Problem: Brian Wayne Transeau (born October 4, 1971), better known by his stage name BT, is an American music producer, composer, technologist, audio technician, multi-instrumentalist, singer, and songwriter. An artist in the electronica music genre, he is credited as a pioneer of the trance and intelligent dance music styles that paved the way for EDM, and for "stretching electronic music to its technical breaking point." He also creates music within many other styles, such as classical, film composition and bass music. BT is also known for pioneering the stutter edit.

In the early years of BT's career, he became a pioneering artist in the trance genre, this despite the fact that he doesn't consider himself a DJ, since he infrequently spins records and comes from an eclectic music background. He was creating trance music before it was known by that name. When he started out, such common elements as a build, breakdown and drop were unclassified. BT's was a unique interpretation of what electronic music could be. His first trance recordings, "A Moment of Truth" and "Relativity", became hits in dance clubs in the UK. His productions were not yet popular in the US, and he was initially unaware that he had become popular across the Atlantic, where UK DJs like Sasha were regularly spinning his music for crowds. Sasha bought BT a ticket to London, where BT witnessed his own success in the clubs, with several thousand clubbers responding dramatically when Sasha played BT's song. He also met Paul Oakenfold, playing him tracks that would make up his first album. He was quickly signed to Oakenfold's record label, a subsidiary of Warner Brothers. BT's 1995 debut album Ima, released on Oakenfold's label, was a progressive house effort. The opening track, "Nocturnal Transmission", was featured in The Fast and the Furious. The album also featured a song with Vincent Covello. Blending house beats with sweeping New Age sounds, Ima helped to create the trance sound. "Ima (Jin )" is the Japanese word for "now". BT has stated that it also means many other things and that the intention of the album is to have a different effect for everyone. Following the release of Ima, BT began traveling to England regularly. It was during this time that he met Tori Amos. They would collaborate on his song "Blue Skies", which reached the number one spot on Billboard magazine's Dance Club Songs chart in January 1997. This track helped expand BT's notability beyond Europe, into North America. He soon began to produce songs for well-known artists such as Sting, Madonna, Seal, Sarah McLachlan, NSYNC, Britney Spears, Diana Ross and Mike Oldfield.

Was the album successful?

Answer with quotes:
Blending house beats with sweeping New Age sounds, Ima helped to create the trance sound. "Ima (Jin )" is the Japanese word for "now".