With musicians from Denmark, Sweden, and Guinea-Bissau, Bliss is an international world music chill out pop band based in Denmark. Since 2001, they have released several albums and their tracks have appeared in international compilations and on television programs like CSI: Crime Scene Investigation. In 2002, Zero 7's Sophie Barker was featured as a guest singer on the Quiet Letters album. In 2009, she also collaborated and provided vocals on the album No One Built This. "Breathe," from Quiet Letters, was featured in the 2009 drama Powder Blue and in Buddha Bar Volume Seven by DJ Ravin and David Visan.