He participated in high school plays, and following graduation, attended the Institute of Higher Radio Broadcasting Studies (ISER) in Buenos Aires.

[2] Larrea designed the format for the show, which in English would translate as "Promptly," to air a variety of music in its 30 minute morning rush hour slot.

He became known to listeners for his hurried, yet precise, speech, and the show was among the first in Argentina to include on-air caller requests and participation.

[3] Rapidísimo won the host numerous Martín Fierro Awards, making him among the broadcasters most so honored.

[4] Larrea, who lost his second wife to breast cancer, underwent a number of surgeries to remove polyps in 2000 and 2001, and to repair a broken meniscus suffered in a fall in 2004.