"The cello is one of the mellowest instruments," says cellist Cheryl House, who will play today at 3 p.m. in the Tawes Recital Hall of the University of Maryland. House, the 1983 winner of the Ninth Mu Phi Epsilon International Competition is now enjoying her prize: a two-year, all-expense-paid tour of concerts booked by the music fraternity.

"There are not many cello concerts," says Ann Gibbens Davis, House's accompanist for the evening. "Cellos are not only difficult to play, but they are also certainly difficult to move around."

Only 26, House, who received her masters at the Juilliard School of Music, has already won first prizes in the 1979 National Coleman Chamber Music Auditions and the Muriel Taylor International Scholarship, and a special prize from the Melodia Recording Company for the best performance of a Soviet composition. She has been invited to play at Carnegie Hall this month.

House plays a Storioni (c. 1780) of Cremona cello and chose the instrument in fifth grade because she thought "the violin was too squeaky."

Today's program will include Tchaikovsky's Pezzo Capriccioso, Op. 62; Leonard Bernstein's Meditation No. 1 from the "Mass"; Beethoven's Sonata in A Major, Op. 69; Suite No. 3 in C Major by J.F. Bach and Sonata in F Major, Op. 99, by Brahms. The concert will be repeated in Baltimore on Monday night at 8 at the Peabody Conservatory.