Nearly 200 free musical concerts ranging from an all-night soul festival to performances by symphony orchestras, jazz groups, choirs, bluegrass bands and mariachi musicians are being scheduled for Washington during inaugural week, committee officials announced yesterday.

Performers - who are donating their services and paying their own travel to Washington - will be playing all over town, from the Kennedy Center to the Museum of African Art, according to plans that are being announced piece by piece this week and next.

"We are making Washington a stage," said inaugural committee co-chairperson Bardyl Tirana at a new conference yesterday. "Carter is everybody's President, Washington is everybody's capital and this inauguration is everybody's inauguration."

The committee stages the traditional inaugural events - receptions for the Vice President, an inaugural eve gala concert, the parade and the inaugural balls - to which President-elect Jimmy Carter's supporters have been invited to buy tickets at $25 each.

The only people who will not have to buy tickets are members of the President and Vice President's families and the diplomatic corps, Tirana said. Former Presidents and First Ladies also are not required to pay for tickets.

The public events scheduled for their week of Jan. 18 to 22 - which cultural events music coordinator Walter ANderson described as a "celebration of our national life" - are paid for by the inaugural committee and donation of services by local organizations and individuals, Tirana said that all corporate and labor union contributions received by the committee will be used to pay for the public events, which are expected to cost over $500.000 including free transportation on inauguration day.

The National and Atlanta Symphony orchestras will join forces at the Kennedy Center for a free concert Jan. 18. Children's puppet shows and plays will be given in the Center's Chautauqua tent and musical groups will perform daily in the Grand Foyer.

In addition to free sightseeing tour-mobiles around town, there will be two buses taking visitors to see Amy Carter's new school Jan. 17, 18 and 19. The buses, which will leave school board headquarters at 415 12th St. NW at 10 a.m., will take visitors also to other Washington schools such as the modern Brookland Elementary School and the eight-story high Woodson High School.

Each tour will return to school board headquarters for entertainment by District students and discussions with school officials.

The Botanic Garden near the Capitol will be staging its first Inaugural Flower Show starting Jan. 18, officials announced yesterday. The exhibit will feature a model of the White House 20 feet long and 12 feet high surrounded by chrysanthemums and accented with a fountain.

Avant-garde films by Taylor Mead and Bob Downey will be shown at the Hirshhorn Museum during the week, and more traditional films at the National Archives and the American Film Institute. "Yankee Doodle Dandy," starring Jimmy Cagney as George M. Cohan will be shown at 4 p.m. on inauguration day at the A.F.I.