The pre-production sessions, which took place between July and August 1989, were crucial in shaping the album's material. Melancholic melodies and more introspective lyrics were conceived during these sessions, alongside danceable rhythms driven by synthesizers and programmed drums. Tracks like "En forma de pez" and "Ella espera" were born in this period. The formal recording in Los Angeles, with Jorge González traveling alone due to visa issues for the other members, benefited from Santaolalla's expertise to achieve a polished sound that fused electronic melodies with pop arrangements, and integrated regional instruments to give it a distinctive Latin American identity.
Corazones resonated strongly in Chile, achieving considerable sales and platinum certifications. The commercial momentum was boosted by the promotion on MTV Latin America of the lead single, "Tren al Sur". Today, the album is recognized for capturing the atmosphere of the post-dictatorship era in Chile and for having influenced later artists. Songs like "Estrechez de corazón", with its lyrics about disillusionment, or "Corazones rojos", which addresses machismo, reflect the social and personal context of the band. The total duration of the album is 45:19, and it was released under the EMI label, with distribution by Capitol Records.