The Quantum Enigma is the sixth studio album by Dutch symphonic metal band Epica. It was released by Nuclear Blast in Europe on 2 May 2014, in the UK on 5 May, and in the US on 6 May. It is their first studio album with new bassist Rob van der Loo, who replaced Yves Huts in 2012.
The album produced two singles: "The Essence of Silence" (released on 17 March 2014) and "Unchain Utopia" (released on 4 April 2014).
Simone Simons – lead and backing vocals Mark Jansen – rhythm guitar, grunts Isaac Delahaye – lead guitar, classical guitar, acoustic guitar Coen Janssen – synthesizers, piano Rob van der Loo – bass Ariën van Weesenbeek – drums, grunts, spoken word
Marcela Bovio (Stream of Passion) – backing vocals Daniël de Jongh (Textures) – additional male vocals (13)
Kamerkoor PA'dam Maria van Nieukerken – choir conductor Alfrun Schmid, Andreas Goetze, Angus van Grevenbroek, Annemieke Nuijten, Annette Stallinga, Annette Vermeulen, Astrid Krause, Daan Verlaan, Frederique Klooster, Jan Douwes, Karen Langendonk, Koert Braches, Martha Bosch, Ruben de Grauw, Silvia da Silva Martinho
Sandlane String Session Ben Mathot – violin Marleen Wester – violin Ian de Jong – violin Emma van der Schalie – violin Merel Jonker – violin Judith van Driel – violin Floortje Beljon – violin Loes Dooren – violin Vera van der Bie – violin Mark Mulder – viola Adriaan Breunis – viola Amber Hendriks – viola David Faber – celli Annie Tangberg – celli Jan Willem Troost – celli Thomas van Geelen – celli
Production Joost van den Broek – engineering, editing, vocal and orchestral arrangements, choir vocals Maarten de Peijper – sound engineer, choir vocals Jacob Hansen – mixing Tonnie Simons – artwork Stefan Heilemann – photography, artwork, design Jos Driessen – engineering, editing Darius van Helfteren – mastering Coen Janssen – choir arrangements Miro – orchestral arrangements Sascha Paeth – vocal line arrangements Gjalt Lucassen – Latin translations Jaap Toorenaar – Latin translations
