- Vicente Amigo - Spanish guitar in "Quisiera Ser" and "El Alma al Aire"
- Gennady Aronin - Violin
- Enrique Badulescu - Photography
- Antonio Baglio - Mastering
- Tim Barnes - Viola
- Maurizio Biancani - Mixing
- Renato Cantele - Engineer, mixing
- Huifang Chen - Violin
- Janet Clippard - Bass
- Gustavo Correa - Violin
- Montse Cortés - Background vocals in "Quisiera Ser" and "El Alma al Aire"
- John DiPuccio - Violin
- Paquito Echevarría - Piano tumbao in "El Alma al Aire"
- Joan Faigen - Violin
- Scott Flavin - Violin
- Chris Glansdorp - Cello
- Alfredo Golino - Drums
- Jorge González - Assistant engineer
- Luca Jurman - Arranger, background vocals
- Mei Mei Luo - Violin
- Roberto Maccagno - Engineer, technical coordinator
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- Charo Manzano - Background vocals in "Quisiera Ser" and "El Alma al Aire"
- Raul Midón - Background vocals
- José Antonio Molina - Arranger, orchestra director
- Susan Moyer - Cello
- Alfredo Oliva - Violin
- Alfredo Paixao - Bass, background vocals
- Wendy Pedersen - Background vocals
- Lulo Pérez - Arranger, trumpet
- Dave Poler - Assistant engineer
- Rita Quintero - Background vocals
- Keith Robinson - Cello
- Emanuele Ruffinengo - Arranger, concept, producer
- Alejandro Sanz - Vocals, background vocals, arranger, concept
- Rafa Sañudo - Art direction, design
- Debra Spring - Viola
- Ramiro Terán - Background vocals
- Christine Tramontano - Assistant engineer
- Ludovico Vagnone - Acoustic guitar, electric guitar
- Bruce Wethey - Violin
- Bogumila Zgraja - Violin
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