Heinrich Schultz, whose 400th anniversary is being celebrated less spectacularly than some other composers' 300ths, will have a concert by the American Vocal Ensemble dedicated entirely to his music, in the Washington Cathedral Tuesday night.

The Washington premiere of Conrad Susa's "Transformations," an "operatic entertainment" in styles that range from classical to jazz, will be presented by the Wolf Trap Opera Co. Friday night at the Wolf Trap Barns.

Liberace's Kennedy Center debut is scheduled for Thursday night, with repeat performances through Sunday. DANCE

The eight-member satirical dance troupe, American Ballet Comedy, led by Bob Bowyer, makes its area debut Friday evening at the University of Maryland's Tawes Theatre. Naked Feet Dance Company appears at the Dance Place Friday and Saturday nights. The recently established American Ballroom Theater, based in New York, and consisting of four couples led by founding team Pierre Dulaine and Yvonne Marceau, makes a stage art out of traditional ballroom dances -- fox trot, lindy, rumba, cha-cha, jitterbug -- with the help of choreography by former adagio and ballroom dancer John Roudis. The company makes its area debut Saturday evening and Sunday afternoon at the Smithsonian's Baird Auditorium. FILM

The Library of Congress will host "An Evening With Jason Robards" Monday at 7:30 p.m. in the Mumford Room on the sixth floor of the Madison Building. Robards' informal discussion of his career will be supplemented by film and video clips. Tuesday and Wednesday at 7 p.m., the library will show "The Iceman Cometh," starring Robards and directed by Sidney Lumet for live television in 1960, again in the Mumford Room. A rare opportunity. Call 287-5677 for reservations.

Tuesday and Wednesday, the American Film Institute's Rock, Roll and Culture series continues with "Don't Look Back," D.A. Pennebaker's priceless "cinema verite" portrait of Bob Dylan..

The free Monday night series continues at the National Theatre with "Mephisto." Call 783-3372.

Monday and Tuesday, the Sidwell Cinema will screen Werner Herzog's "Aguirre, the Wrath of God"; Wednesday and Thursday, "The Phanthom of Liberty," one of Luis Bun uel's last films.

Tuesday and Wednesday at the Circle Theatre, "Gaslight" and "North by Northwest"; Thursday through Saturday, "The Women" and "Woman of the Year."

Wednesday at the Smithsonian's Resident Associates Program, Bernardo Bertolucci's "Tragedy of a Ridiculous Man."

Thursday through Sunday, the Biograph will bring back Bertrand Tavernier's "A Sunday in the Country," one of last year's best films. POP MUSIC

Al Jarreau and David Sanborn: one sings like a sax, the other blows like a voice. Both are at the Merriweather Post Pavilion tonight.

Having made his best record in years for Alligator, Roy Buchanan, Washington's first guitar legend, makes a rare club appearance at Club Saba on Monday.

Sarah Vaughan, among the truly exquisite and enterprising vocalists of our time and the finest interpreters of American popular song, is at Blues Alley, Tuesday through Sunday.

Hard-hitting Los Angeles rock with a Berkeley conscience; the Textones are at the Bayou on Tuesday.

Danny O'Keefe and Eric Bogle, two of the better songwriters from America and Australia, respectively, share the bill at Saba on Wednesday.

Huey Lewis and the News has popularized the bar-band tradition, but the better news at the Merriweather Post Pavilion on Saturday and Sunday is the opening act, the Neville Brothers, the last word in New Orleans rhythm and funk.