A new chamber music ensemble, under the artistic direction of pianist Earl Wild, has been formed by Wolf Trap and will make its debut there this summer.

To be called the Concert Soloists of Wolf Trap, the group will give two concerts there this summer, says Wild, and 12 to 15 during the next winter season, beginning Nov. 20 in Carnegie Hall.

Other members include violinist Oscar Shumsky, harpist Gloria Agostini, cellist Charles Curtis, guitarist Eliot Fisk and flutist Gary Schoker.

"Oscar and I have been performing together off and on for decades," said Wild in an interview this week, "so it was only natural that we should take this further step. And it has been made possible because of the support of Kay," a reference to Wolf Trap benefactor Catherine Filene Shouse.

It follows a new trend to form chamber music groups at major cultural centers. Other examples are the Theater Chamber Players of Kennedy Center and the Chamber Music Society of Lincoln Center. Expenses beyond box-office receipts will be born by the Wolf Trap Foundation, according to Wolf Trap press representative Larisa Wanserski.

The first concert, on July 15, will include a Beethoven Violin sonata, Debussy's "Trio for Harp, Flute and Viola" and the Tchaikovsky "Piano Trio." The second program, on Aug. 12, will include works by Schubert, Saint-saens, Villa-Lobos and Smetana.

At the same time Shouse announced that Wolf Trap will construct a new year-round "barn," to be used for "experimental works, symposiums, informal chamber concerts and such." It will be designed by noted architect O'Neil Ford.

"All we know for sure now is that is will be of wood, because that is best for music," said Shouse. The location will be on the grounds of Shouse's country home, Plantation House, which is on the opposite side of the Dulles Freeway from the main amphitheater.