Gustavo Cerati, former lead singer of the Argentine rock band Soda Stereo, which became one of the most influential groups in the “rock en Espanol” movement that defined Latin pop music of the 1980s and 1990s, died Sept. 4 in Buenos Aires. He was 55.

His family announced the death, which came four years after a stroke put him in a coma.

With what the Los Angeles Times called “Byronic good looks, anguished vocals and alternately ambient and power-riffing guitar playing,” Mr. Cerati helped make Soda Stereo one of the most popular bands in Argentina and Latin America.