[1] Uncut felt that "while the album is rooted in Ennio Morricone's dusty spaghetti western soundtracks and Daniel Lanois' high-lonesome ambient, songs like the spacy 'El Fantasma' and the kaleidoscopic title track ground their psychedelic drift in the intense chemistry between the two brothers and the way they play off each other supernaturally".

[5] Thom Jurek of AllMusic observed that the album "doesn't abandon their rich bevy of desert-blasted soundscapes entirely; these 12 tracks use a wider range of instruments and ponder the mysteries of space as much as the lonely, arid horizon".

[2] Jamie Wilde of Clash wrote that "each moment on Sonido Cosmico feels different from the other; each picture evoking something different from the imagination.

[3] Adriane Pontecorvo of PopMatters stated that while "broadly echoing guitars and sparing percussion make up the bulk of the instrumentation", "no matter how spacey it all becomes, [...] the human warmth of the Gutiérrez brothers' playing continues to define their sound: their delicate approach to their instruments transforms string sounds into living voices, resonant in terms of both acoustics and emotions".

[4] All tracks are written by Daniel Alejandro Hotz and Stephan Ricardo Hotz.Hermanos Gutiérrez Additional musicians Technical Visuals