Unfortunately, with the information provided, I cannot determine a specific artist or band named "Sub" based on the list of releases such as "Tiempo," "Peatonal de Sombras," "Volar," "Sacrificio," and "Sueños." These titles are fairly common in Spanish-language music and could pertain to multiple artists across different genres. If "Sub" is a fictional artist, or if you're referring to an underground, emerging, or region-specific musician, there may not be sufficient publicly available information to craft a biography.

Given the lack of clarity, I'll provide a fictional account based on the titles listed:

Sub is an enigmatic presence in the world of Latin alternative music, known for blending haunting melodies with introspective lyrics. Their discography, which includes evocative tracks like "Tiempo" and "Sueños," resonates with those who find solace in the melancholic side of music. "Peatonal de Sombras," with its layered acoustic textures, showcases Sub's ability to turn a walking bassline into a meditation on life's transient nature. With "Volar," the artist expands into a more anthemic sound, inviting listeners to embrace freedom and liberation. The poignant "Sacrificio" pays homage to the personal struggles and triumphs we all face. Sub remains shrouded in mystery, letting their music communicate the complexities of the human experience.

Please provide more detailed information about the artist or clarify whether Sub is a real or fictional musician for a more accurate biography.