'Sleep' is the collaboration between Eric Whitacre and poet Charles Anthony Silvestri, drawing on the mystical moment between awareness and sleep. For the setting of Lux Aurumque, Whitacre chose the Latin translation of an Edward Esch poem, enhancing the elegant simplicity of this new work. The text explores Leonardo da Vinci's dreams of flying. The blend of Italian madrigal and contemporary style supports the text, once again, by Charles Anthony Silvestri.