Edward H. Mattos, 62, former executive director of the Wolf Trap Foundation who also was a concert pianist, a composer, a poet and a former Foreign Service officer, died March 11 at his home in Arlington after a heart attack.

Mr. Mattos, who began his career as a concert pianist when he was 5, was director of the Arts and Humanities Program at the U.S. Information Agency from 1972 to 1977, when he retired from the government. He joined the Wolf Trap Foundation in 1981 and left it two years ago.

Since then, he had written music reviews for The Washington Post, served as music director with the International Poetry Forum of Pittsburgh, and acted as a consultant for Arts International. He had also taught piano and singing.

He came to Washington in 1963 to join the USIA, and he was posted as a cultural affairs officer to the Philippines, Spain, Malaysia and Canada. As a Foreign Service officer he did goodwill tours as a pianist, conductor and lecturer, and he also produced and directed such popular musicals as "My Fair Lady" and "The Sound of Music."

He called himself "first of all and best of all a musician," and he believed deeply in the civilizing influence of artistic endeavors and in the superiority of a live performance over motion pictures or television. "Live performance increases our respect for the liveness of word and deed. It takes human beings to do that; it can't be done technologically," he once said.

Mr. Mattos was born in Oakland and studied music in New York and San Francisco when he was young. He taught at the Juilliard School of Music, and from 1950 to 1963 was on the faculty at the Oberlin Conservatory of Oberlin College.

He left the USIA in 1971 to become director of public affairs at the John F. Kennedy Center for the Performing Arts. He remained in that position for a year and then returned to the information agency to take charge of the Arts and Humanities Program.

In 1981 and 1982, Mr. Mattos was director of International Programs and The Barns at Wolf Trap and then became executive director of the foundation. He had participated as a pianist in dozens of concerts at The Barns since the early 1970s.

He also wrote extensively, and his subject matter ranged from informational and educational material to radio and television scripts, articles in music journals, short stories and poems. He had been a director of church and synagogue music in California, New York, New Jersey and Ohio and was a former music director of Africanis Instructus at the Lenox Theatre in Stockbridge, Mass.

Mr. Mattos is survived by his wife, Doris Eleanor, of Arlington; three daughters, Laure Stern of New York City, Katherine Krell of Washington, and Elizabeth Cheever of Middleburg, Va.; his mother, Emily Mattos, of Livermore, Calif.; a brother, Richard, of Oakland, and one grandson.