"Ecstasy" is the final single to be lifted from following previous releases "World of Idols", "Désir des astres", and "Colaïdo". While the song features some of the strongest electronic influence on the album, it was composed entirely on cello.

Speaking about the track, Claus explains: “These sounds were transformed, put through machines, digitized, stretched, sometimes metamorphosed into synthetic textures or even percussion. So it’s not a meeting between cello and electronics, but rather a story of transformation."