Dan Swanö and Simone Simons are both what? 
vocalist
Simone Simons
Simone Johanna Maria Simons (born 17 January 1985) is a Dutch singer-songwriter.
 She is the lead vocalist of Dutch symphonic metal band Epica.
Dan Swanö
Dan-Erland Swanö (born 10 March 1973) is a Swedish musician who is currently the vocalist, guitarist, ex-bassist and ex-drummer for the band Nightingale, lately vocalist, keyboardist and drummer for the band Witherscape, as well as the Owner of Unisound but he achieved fame as the vocalist and songwriter of progressive death metal band Edge of Sanity.
Cryptic (album)
Cryptic is the seventh full-length studio album by the Swedish death metal band Edge of Sanity, released on December 1, 1997 by Black Mark Production.
 It is the only Edge of Sanity album in which Dan Swanö does not contribute.
 Guitarist Andreas Axelsson hired a new vocalist (Roberth Karlsson, who was previously the vocalist in Swanö's avant-garde death metal band Pan.Thy.Monium) in an attempt to keep the band together. Pan.Thy.Monium
Pan.Thy.Monium was a Swedish avant-garde metal band formed and led by Dan Swanö with several members from another project of his, Edge of Sanity.
 The group disbanded in 1996, after recording "Khaooohs and Kon-Fus-Ion". Nightmares Made Flesh
Nightmares Made Flesh is the second album by Swedish death metal band Bloodbath.
 It was released by Century Media Records on September 27, 2004.
 The only album to feature Peter Tägtgren, who was brought in to replace Mikael Åkerfeldt as the vocalist, as well as the first to feature Martin Axenrot to replace Dan Swanö as the drummer (with Swanö now playing guitar).
 This was Swanö's last album with Bloodbath. The Breathing Shadow
The Breathing Shadow is the first album by the band Nightingale.
 It was recorded and mixed within a week by Dan Swanö alone at his Unisound studio; Nightingale did not yet exist as a band, and was simply a solo project by Swanö.
 This is the only album of Nightingale to use a drum machine (the other albums have Swanö or someone else on drums).
 Unlike the hard rock/AOR-oriented direction of later albums, "The Breathing Shadow" showcases the style of goth rock similar to The Sisters of Mercy.
 The songs "Nightfall Overture" and "The Dreamreader" were re-recorded on the 2004 compilation album, "Nightfall Overture". Dead Reckoning (album)
Dead Reckoning is the eighth studio album (and fifteenth overall) by progressive metal band Threshold.
 It is their first album since the departure of founding member Nick Midson and the last to feature long time vocalist Andrew "Mac" McDermott.
 It is also the only one to feature guest vocals (provided by Dan Swanö on two tracks) and their first album on their current label, Nuclear Blast.
 The song "Pilot in the Sky of Dreams" appeared on the 2008 film soundtrack . Morningrise
Morningrise is the second studio album by Swedish progressive metal band Opeth.
 It was released on June 24, 1996, in Europe by Candlelight Records and on June 24, 1997, in the United States by Century Black.
 The recording sessions took place at Unisound studio, in Örebro, between March and April 1996, and once more the band produced alongside Dan Swanö.
 "Morningrise" was the last Opeth album produced by Swanö.
 It was also the last Opeth release with drummer Anders Nordin and bassist Johan De Farfalla. Into Night's Requiem Infernal
Into Night's Requiem Infernal is the seventh studio album by the American death-doom band Novembers Doom.
 It was released on July 7, 2009 through The End Records.
 The album was recorded at Belle City Sound studio in Racine, Wisconsin with bassist Chris Djuricic producing and Dan Swanö mixing at Unisound in Örebro, Sweden. Beyond (Omnium Gatherum album)
Dil Beyond is the sixth full-length studio album of Finnish melodic death metal band Omnium Gatherum and their second record released on Lifeforce Records.
 The album was released digitally worldwide on February 22, 2013, and physical CD was released in Finland, Germany, Switzerland and Australia on February 22, in the rest of Europe on February 25, and in North America on March 5.
 the album was produced by Teemu Aalto and Sami Koivisto and recorded at Teemu Aalto Music Productions studio (except for drums, which was recorded at Nordic Audio Labs by Sami Koivisto).
 It was mixed and mastered by Dan Swanö at Unisound Studio.
 The album's artwork was created by Olli Lappalainen.