Maryland University's Seventh Annual International Piano Festival and Competition will run from Sunday to Aug. 6.

The competition involves semi-finals at 3:30 p.m., Monday through Friday, Aug. 1-5, the finals at 8:30 p.m., Saturday, Aug. 6, with Sergiu Commissiona and the Baltimore Symphony providing the orchestral backing.

The festive aspects of the week will include nightly recitals at 8:30 by Aldo Ciccolini, Philippe Entremont, Rudolf Firkusny, Paul Jacobs, Hans Richter-Haaser and Rosalyn Tureck, playing from Sunday to Aug. 5. Ciccolini will play an all-Granados concert, Richter-Haaser an all-Beethoven, and Tureck's program is the Goldberg Variations by Bach. On the piano, natch.

There will be lecture-recitals during the week on music by Freitas Branco, Prokofiev, Medtner, Rave, Ravel and Haydn, and master classes by each of the visiting recitalists.

For details on the entire week, including ticket prices, write or call the Department of Music, Maryland University, College Park, Md. 20742, phone 454-2501.

Brazilian-born cellist Aldo Parisot has been spending the last six weeks directing and teaching at a cello school he started in his native state of Paraiba. The school, operating from June 15 to Jul 30, is in the coastal city of Joao Pessoa. Forty students from Europe, the United States, Brazil and Israel were chosen for the school. One of the chief problems was transportation of the instruments of 27 North Americans. Varig Airlines solved it by constructing special containers.

Next year Parisot plans to expand the school to include opera, chamber orchestra and an international string competition.

Two free concerts are coming up at Wolf Trap Farm Park in the small shell by Wolf Trap Run at 2 p.m. on Sundays Aug. 7 and 14. On Aug. 7, the Navy Band Commanders will play jazz and ragtime. On Aug. 14, the Fort Monroe Army Field Band will play.

The National Opera Institute has announced a new public information grant program designed "to increase awareness of an enthusiasm for opera on a wide basis." The program will make funds available for projects which operate at the regional and national levels and which are of benefit to the progression in general.

For complete information, write to the National Opera Institute, Kennedy Center, Washington, D.C. 20566.