Tim Rowe wants to extend the boundaries of the metropolitan musical community.

As executive director of the Great Falls Concert Series, now in its sixth season, Rowe has brought professional musicians to a variety of venues in Northern Virginia, and this year he will go to Loudoun County.

The first program of the season features the Amadeus Orchestra performing two concerts at St. Francis Episcopal Church in Great Falls at 7:30 and 9 p.m. Saturday. "What's nice is families will be coming to the early concert and the aficionados will be at the second concert," said Rowe, who is music director of the orchestra.

It will play baroque works that almost everyone has heard along with music that few are likely to have heard. Rowe will direct from the keyboard for Handel's Organ Concerto in F, and National Symphony Orchestra cellist Janet Frank will play Vivaldi's Cello Concerto in E minor in addition to Pachelbel's familiar "Canon."

Also, the orchestra will perform what Rowe said will be the Washington premiere of Vivaldi's Concerto Madriglesco. With several members of the Handel Festival Orchestra under his direction, Rowe said, the ensemble will bring a knowledge of historically correct performance style to the evening of early music.

The next concert, at 5 p.m. Nov. 15, will take place at the Loudoun County Day School. That program will include operatic arias sung by Cathryn Frazier-Neely, music by Ralph Vaughan Williams and the Emperor Concerto with pianist Neal Larrabee. Larrabee, an Artur Rubinstein Medal winner, is to return in May to perform a solo concert at St. Francis Church.

The Amadeus Orchestra will present a Christmas concert Dec. 12, featuring Handel's Water Music and Hallelujah Chorus as well as selections from Gilbert and Sullivan's "Pirates of Penzance." Peter Hamlin's award-winning "Mr. Grump's Christmas" will receive its area premiere.

A new seven-member vocal ensemble, Cantare, is to perform in February under the auspices of the concert series, singing classical pieces.

In April, the orchestra will present the world premiere of Rowe's composition, "A Tale of Two Bad Mice," after the story by Beatrix Potter. Works by Mozart and Ravel will make up the remainder of the concert. Concerts in December, February and April will take place in St. Catherine of Siena Church in Great Falls at 8 p.m.