As a musician, producer and composer, Rafael Toral has been involved, at different stages of his life, with rock, ambient, contemporary, electronic and jazz cultures. In the early 1990s, he recorded internationally acclaimed albums such as "Sound Mind Sound Body" (1994), "Wave Field" (1995) and "Chasing Sonic Booms" (1996), essential works of guitar exploration that earned Toral great prominence abroad and recognition from names such as Phill Niblock, Sonic Youth and Jim O'Rourke. In the 2000s, he launched a project in which, over the course of 15 years, he developed an approach to electronic music that took him away from the instrument that had brought him international recognition. After directing various ensembles, in 2016 he inaugurated the ensemble he directed until 2023, the Space Quartet. 

The result of three years of experimentation and recording, in which the knowledge of more than three decades of musical research is synthesised, "Spectral Evolution" is the quintessential album, which marks Rafael Toral's return to the guitar, and which will be presented with a visual environment composed specifically for the composer's music, the result of an "open call" aimed at emerging video and film artists, created in an artistic residency at Curtas' STEREO laboratories, in partnership with ESMAD.