There are at least two artists by the name of Ruido. 1) Puebla-based beatmaker and producer Ruido associated with the Mexican PIR▲.MD record label.
2) Californian hardcore thrash with a touch of grind, with lyrics in both english & spanish.
They've shared 7"'s with bands like Fuck on the Beach, Te-Zacrifico & Insult. Check here for music!!!