Caifanes

• Saúl Hernández
  Saúl Hernández
  Saúl Alfonso Hernández Estrada , is the former lead singer, songwriter and guitarist of Caifanes, a famous Mexican rock en español group formed in 1986.In 1996, Saúl Hernández sang a duet with Algerian raï singer Khaled...
  
   - vocals, 2nd rhythm guitar on "El año del dragón"
• Alejandro Marcovich - electric and acoustic guitars, violin on "Miedo" and "La Llorona"
• Alfonso André - drums, percussion, drum programming on "Hasta que dejes de respirar"

Guests

• Federico Fong
  Federico Fong
  Federico Fong is a member of several bands in Mexico and the United States:*Hip Hop Hoodíos*Jaguares*La Barranca*CaifanesBorn in Northern California's Bay Area in 1967 to a Panamian father of Chinese descent and an American mother, Fong relocated at a young age with his family to Mexico City where...
  
   - fretted and fretless basses
• Yann Zaragoza - piano, Hammond organ, synthesizer (except on "Aquí no es así")
• Cecilia Toussaint - choirs on "Afuera", "Aquí no es así", and "Hasta que dejes de respirar"
• Lenny Castro
  Lenny Castro
  Lenny Castro is an American freelancing percussionist in the studio recording industry in the Los Angeles area.-Early life:Castro is a percussionist of Puerto Rican descent and was born and raised in New York City. His father, Hector Castro, played the keyboard in a Latin style and gave his son...
  
   - percussion
• Stuart Hamm
  Stuart Hamm
  Stuart "Stu" Hamm is an American bass guitar player, known for his session and live work with numerous artists as well for his unconventional playing style and solo recordings.-Beginning career:...
  
   - fretless bass on "Quisiera ser alcohol"
• Jerry Hey
  Jerry Hey
  Jerry Hey is an American trumpeter, flugelhornist, horn arranger, string arranger, orchestrator and session musician who has played on hundreds of commercial recordings, including Thriller and the distinctive flugelhorn solo on Dan Fogelberg's hit Longer....
  
   - trumpet on "Quisiera ser alcohol"
• Jerry Goodman
  Jerry Goodman
  Jerry Goodman is an American violinist best known for playing electric violin in the bands The Flock and the jazz fusion Mahavishnu Orchestra. Goodman actually began his musical career as The Flock's roadie before joining the band on violin. Trained in the conservatory, both of his parents were...
  
   - electric violin on "El animal" and "Pero nunca me caí"
• Graham Nash
  Graham Nash
  Graham William Nash, OBE is an English singer-songwriter known for his light tenor vocals and for his songwriting contributions with the British pop group The Hollies, and with the folk-rock band Crosby, Stills, Nash & Young. Nash is a photography collector and a published photographer...
  
  - harmonica on "Pero nunca me caí"
• Jeffrey Marty Vanston - synthesizer on "Aquí no es así" and "Ayer me dijo un ave"