CLASSICAL MUSIC station WGMS-AM/FM (570/103.5), which has been airing highlights of this week's University of Maryland International Piano Festival and William Kapell Competition at College Park, will broadcast the finalists in concert with the National Symphony live from the Kennedy Center Concert Hall 8:30 p.m. Saturday.

WAMU-FM (88.5) has made some adjustments to its Sunday schedule including the addition of Larry Groce's "Mountain Stage," a smaller-scale "Prairie Home Companion," presented by West Virginia Public Radio. The two-hour show begins at 1 p.m. and this week feature's Washington's own Cathy Fink. Susan Stamberg's two-hour "Weekend Edition" has moved into the 10 a.m. to noon spot. Jazzman Rusty Hassan, who once occupied the 2 to 6 p.m. slot, moves to WDCU-FM (90.1) beginning August 9 at 3 p.m.

Here's what else is in the air: FRIDAY

DIANE REHM SHOW AT 10 A.M.

WAMU-FM (88.5) -- Rehm's guest is Nien Chen, whose autiobiography "Life and Death in Shanghai" tells of her arrest by Mao's Red Guards, her six-year ordeal in prison, and her triumph over her tormentors.

PERFORMANCE TODAY AT NOON.

WETA-FM (90.9) -- NPR's classical music and arts digest. One hour.

CROSSTALK AT NOON

WDCU-FM (90.1) -- Ernest White hosts a two-hour talk show.

COUNTRY OLDIES AT NOON

WMZQ-AM (1390) -- Katy Daley spins classic country hits by request.

WEEKENDER AT 6:30 P.M.

WETA-FM (90.9) -- Dan Gawthrop with 90 minutes of folk, classical, jazz and new-age music and a rundown of local weekend happenings.

JAZZ IMPRESSIONS AT 7 P.M.

WDCU-FM (90.1) -- Bill McLaurin hosts five hours of jazz.

NIGHTLITE AT 7 P.M.

WLTT-FM (94.7) -- Steve Allan plays five hours of soft rock and jazz.

AUDIO EVIDENCE AT 7 P.M.

WPFW-FM (89.3) -- Betty Benjamin with commentary, news, music and a retrospective look at singer Billie Holliday who died this date in 1959.

SOCK HOP AT 8 P.M.

WXTR-FM (104.1) -- Sherry Ellison spins oldies until 1.

SATURDAY

WEEKEND EDITION AT 8 A.M.

WAMU-FM (88.5) -- NPR's Scott Simon is host until 11 with news and features. At 11, a two-hour version of the show on WETA-FM (90.9).

THE BAMA HOUR AT 11 A.M.

WPFW-FM (89.3) -- Jerry "The Bama" Washington hosts three hours of blues followed at 2 by three hours of oldies with Billy Ray Edwards on "The Way We Were."

AFRICAN CONNECTION AT 11 A.M.

WDCU-FM (90.1) -- Ibrahim Bah plays three hours of African and Carribbean music.

MAC McGARRY AT NOON

WWRC-AM (980) -- Featuring Perry Como, Henry Mancini, Benny Goodman and Artie Shaw. At 2, McGarry will begin two hours of talk programming.

ENTERTAINMENT AT 1 P.M.

WGMS-AM/FM (570/103.5) -- Bob Davis with music from Broadway productions. One hour.

THE SATURDAY SHOW AT 1 P.M.

WETA-FM (90.9) -- Lyn Farmer spins four hours of recent classical recordings.

DATELINE AMERICA AT 1:40 P.M.

WTOP-AM (1500) -- With Charles Kuralt.

FAVORITE THINGS AT 7 P.M.

WDCU-FM (90.1) -- Jazz 90's Gerry Hanlon counts down the country's top 30 jazz albums of the week. Three hours.

SOLID GOLD AT 7 P.M.

WMJR-FM (107.7) -- Live from New York, Dick Bartley hosts a five-hour oldies request program. Call 800/634-5789.

SUPER GOLD AT 7 P.M.

WXTR-FM (104.1) -- Mike Harvey hosts a five-hour live request show from the West Coast.

HOT JAZZ AT 7 P.M.

WAMU-FM (88.5) -- Robert Bamberger presents three hours of vintage jazz and profiles vocalist Una Mae Carlisle, accompanied by Lester Young, the John Kirby Sextet, Ray Nance and others from 1940-44.

BLUEGRASS OVERNIGHT AT MIDNIGHT

WAMU-FM (88.5) -- Six hours of bluegrass.

SUNDAY

GOSPELTIME AT 5 A.M.

WAMU-FM (88.5) -- Walter Kennedy features traditional gospel music followed at 6 by Red Shipley and "Stained Glass Bluegrass."

G-STRINGS AT 7 A.M.

WPFW-FM (89.3) -- Tom Cole with four hours of guitar music.

AMERICAN TOP 40 AT 8 A.M.

WRQX-FM (107.3) -- Casey Kasem counts down Billboard's hits of the week.

MUSIC AND MEMORIES AT 8:05 A.M.

WMAL-AM (630) -- Bill Mayhugh features the hits of the '40s, '50s and '60s.

RICK DEES AT 8 A.M.

WAVA-FM (105.1) -- L.A.'s hot DJ counts down the nation's Top 40 hits.

AWAKE, ALIVE & JEWISH AT 8 A.M.

WNTR-AM (1050) -- Rabbi Shmuel Kaplan and Michael Hoffman are hosts. One hour.

PLAY IT AGAIN, ED AT 8 A.M.

WWRC-AM (980) -- Ed Walker spins tunes from the '30s through '60s.

MAX REZNICK AT 9 A.M.

WNTR-AM (1050) -- Two hours of Jewish music, news and entertainment.

LOST AND FOUND AT 9 A.M.

WMJR-FM (107.7) -- Two hours of the "lost hits" of the '70s.

JAZZ BRUNCH AT 9 A.M.

WLTT-FM (94.7) -- Steve Allan spins three hours of contemporary light jazz favorites.

COUNTRY COUNTDOWN AT 11 A.M.

WMZQ-AM (1390) -- Bob Kingsley features the nation's Top 40 country tunes.

ISRAEL TODAY AT 11:30 A.M.

WMET-AM (1150) -- Michael Hoffman hosts 30 minutes of Israeli news, information and music.

JAZZ AT NOON

WDJY-FM (100.3) -- Brute Bailey hosts three hours of mainstream and contemporary jazz.

WASHINGTON TOP 40 AT NOON

WINX-AM (1600) -- Kraig Erickson counts down the area's Top 40 songs of the week. Three hours.

BEST OF BROADWAY AT 1 P.M.

WWDC-AM (1260) -- Eddie Gallaher features an hour of cast recordings from Broadway's best shows.

CLASSICS OF EBONY AT 2 P.M.

WGTS-FM (91.9) -- Nevilla Ottley presents an hour of music by black composers and performers.

JAZZ CORNUCOPIA AT 2 P.M.

WPFW-FM (89.3) -- John Zimbrick features three hours of mainstream jazz.

SPIRIT OF INDIA AT 5 P.M.

WMET-AM (1150) -- An hour of Indian news and music.

ALL THINGS CONSIDERED AT 5 P.M.

WETA-FM (90.9) -- An hour of news and information from National Public Radio.

BIG BROADCAST AT 7 P.M.

WAMU-FM (88.5) -- Local radio historian John Hickman with seven radio programs from the '40s beginning with "To the Rear March!" followed by "Yours Truly Johnny Dollar" starring Bob Bailey; "Duffy's Tavern"; "Escape"; "Recollections"; "The Bell Telephone Hour"; and classic radio drama in "Cavalcade of America."

THOSE OLDIES BUT GOODIES AT 7 P.M.

WDCU-FM (90.1) -- Guy Tinner hosts three hours of old gold and features soul and R&B from 1966 to '76.

REGGAE SPLASHDOWN AT 9 P.M.

WHFS-FM (99.1) -- Neci spins three hours of reggae.

THE BLUES ROOM AT 9 P.M.

WCXR-FM (105.9) -- Frank Adair with two hours of blues.

NEWSWEEK ON-AIR AT 9 P.M.

WTOP-AM (1500) -- A radio version of the weekly news magazine featuring top stories of the week and interviews with prominent newsmakers. One hour.

CAMPBELL PLAYHOUSE AT 11 P.M.

WMAL-AM (630) -- The Mercury Playhouse Theater performs "The Green Goddess."

PIANO JAZZ AT 11 P.M.

WAMU-FM (88.5) -- Marian McPartland's guest is Jane Jarvis. One hour.

THE BEST OF LARRY KING AT 12:05

WTOP-AM (1500) -- A repeat of several King shows, until 5 a.m.