Voice: Alejandro Sanz - Producer: Alfonso Pérez - Producer: Alejandro Sanz - Producer: Javier Limón - Recording Arranger: Alfonso Pérez - Recording Arranger: Alejandro Sanz - Recording Arranger: Javier Limón - Recording Arranger: Chris Hierro - Recording Arranger: Javier Limón Junior - Programmer: Alfonso Pérez - Programmer: Alejandro Sanz - Programmer: Javier Limón - Programmer: Chris Hierro - Programmer: Javier Limón Junior - Recording Engineer: Carlos Del Valle - Recording Engineer: Peter Walsh - Engineer: Daniel Guzmán - Engineer: Carlos Del Valle - Engineer: Marcos Mejías - Asst. Recording Engineer: Carlos Del Valle - Asst. Recording Engineer: Caco Refojo - Asst. Recording Engineer: Frank Lozano - Asst. Recording Engineer: Kike Bosch - Recording Engineer: Martin Roller - Music Engraver: Iván Valdés - Mix Engineer: Peter Walsh - Programmer: Peter Walsh - Assistant Mixer: Carlos Del Valle - Assistant Mixer: Frank Lozano - Mastering Engineer: Frank Arkwright - Orchestra/Member: Orquesta Sinfónica de Bratislava - String Arranger: Alfonso Pérez - Orchestra Leader: David Hernando Rico - Piano: Alfonso Pérez - Acoustic Guitar: Alfonso Pérez - Cello: Boris Boho - Editor: Alfonso Pérez - Editor: Carlos Del Valle