Music of Mozart, Rossini and Piston will be presented by the Westminster Chamber Players at 3 p.m. today in Nunemaker Place on the Westminster College campus.

Performing will be clarinetist Gary Merrell, violinists Suzanne Brimhall and Lauren Flygare, violist Anthony Doyle, cellist Steven Elbein and Richard Kline, bass. They will be heard in Rossini's Duetto for Cello and Bass, Piston's Three Counterpoints for Violin, Viola and Cello and the Mozart Clarinet Quintet.Admission is free.

- THE DEER VALLEY INTERNATIONAL Chamber Music Festival will launch its 1991 series of winter and spring concerts with a pair tonight at the Park City Community Church and Monday, Feb. 18, in Salt Lake City at the Broadway Stage. Starting time for each is 8 p.m.

Performing each evening will be clarinetist Russell Harlow, violinist Arturo Delmoni, violist Leslie Blackburn, cellist Terry King and pianist Robert Moeling. Their program will consist of Beethoven's Sonata in D major for Violin and Piano, Op. 12, No. 1, Dvorak's "Dumky" Trio for Piano and Strings and the Mozart Clarinet Quartet, arranged from the K. 496 Piano Trio.

King and Moeling are currently recording the Beethoven cello sonatas, a followup to their Music & Arts disc of the Mendelssohn cello sonatas. Delmoni's latest recording is "Songs My Mother Taught Me," including pieces of Kreisler and Sarasate.

Further concerts are set for April 1 and 2, with violinist Charles Castleman and pianist Michael Gurt; April 28 and 29, with violinist Charles Lubove and pianist Nina Lugovoy; and May 19 and 20, with the Drinkall-Baker Duo.

General admission is $10 ($8 students/seniors), available at the door.

Delmoni, Castleman and Lubove will be among the artists on this year's Deer Valley Chamber Music Festival, to run from July 18 through Sept. 1. Others include violinists William Preucil, Andres Cardenes, Manuel Ramos and Paul Rosenthal. For information call 649-1217.

- TRADITIONAL MARCHES, Broadway show music and 20th century classics will be among the offerings on a concert featuring the Utah State University Symphonic Band and Wind Ensemble Tuesday, Feb. 19, at 8 p.m. in the Kent Concert Hall of USU's Chase Fine Arts Center.

Under the direction of Dennis Griffin, the program will include Copland's "Fanfare for the Common Man," selections from Andrew Lloyd Webber's "Phantom of the Opera" with tenor Michael Ballam, Alfred Reed's "Viva Musica," an arrangement of "Come, Come, Ye Saints" and Shostakovich's "Festive Overture." Tickets, at $3 adults, $2 students and $10 per family, will be available at the door.

- THE MITCHELL-RUFF DUO, a piano-French horn pair, will perform Tuesday, Feb. 19, at 9 p.m. in the Madsen Recital Hall of Brigham Young University's Harris Fine Arts Center. Tickets, at $6 with BYU identification and $7 without, are available at the music ticket office, 378-7444.

Formed in 1955 when pianist Dwike Mitchell and bassist-French hornist Willie Ruff left Lionel Hampton's band to strike out on their own, the duo helped introduce jazz to the Soviet Union in 1959, teaching and playing at conservatories in Leningrad, Moscow, Kiev, Yalta and Riga. The pair did the same in China in 1981, teaching in Shanghai and Beijing.

Ruff is professor of music and Afro-American studies at Yale University and a part-time filmmaker. Mitchell is based in New York, where he teaches.

- BALLET WEST continues its run of Tchaikovsky's "Sleeping Beauty" this week, with performances at the Capitol Theatre Wednesday through Friday, Feb. 20-22, at 7:30 p.m and Saturday, Feb. 23, at 2 and 7:30 p.m. Due to popular demand, a performance has been added featuring Anatoli Kucheruk, Sunday, Feb. 24, at 2 p.m.

With costumes and sets by Peter Cazelet, the production revives the company's great success of five years ago, which it subsequently took to the Kennedy Center. Kucheruk, a principal dancer of the Kiev Ballet, will dance Prince Florimund, alternating with Robert Arbogast and Raymond Van Mason. Wendee Fiedeldey, Erin Leedom and Jane Wood will alternate as Princess Aurora.

Individual tickets, priced from $8 to $30, are available at the Ballet West box office in the theater, or as part of a minipackage with "Romeo and Juliet," to be presented next April. For information call 533-5555.

- THE PRICE VOCAL ENSEMBLE will perform Friday, Feb. 22, at 7:30 p.m. in the Temple Square Assembly Hall. Organized in 1989, the 21-member group is directed by Russell Wilson of the College of Eastern Utah. They will be joined by the Castle Brass, composed of CEU faculty members, in a program of music by Gesualdo, Lassus, Morley, Holst, Vaughan Williams and Randall Thomp-son, among others.

Admission is free but limited to those 8 and older.

- ANOTHER LANGUAGE will present "Home Movies & Other Family Secrets" Fridays through Sundays Feb. 22-24 and March 1-3 at 8 p.m., in Another Language performance studio, 345 Pierpont Ave.

The multimedia program will feature new works and performances by members of Another Language. Tickets are $7 ($5 students/seniors), available at the door.

- UTAH SYMPHONY principal horn Shelley Showers will be the featured soloist on the orchestra's concerts Friday and Saturday, Feb. 22 and 23, at Symphony Hall. She will solo in the first of Richard Strauss' two horn concertos, in E flat major, with associate conductor Kirk Muspratt conducting.

In addition Muspratt will lead the orchestra in performances of "Medea's Meditation and Dance of Vengeance" by Samuel Barber, the Utah premiere of Stephen Paulus' Concertante for Orchestra and Rimsky-Korsakov's "Scheherazade."

Showers joined the orchestra in 1989 after serving as acting principal horn of the Cincinnati Symphony. A native of Pennsylvania, she studied at Philadelphia's Curtis Institute with Mason Jones and Myron Bloom and currently studies with the Chicago Symphony's Arnold Jacobs.

Tickets are priced from $10 to $29, with student tickets available at $5. A complimentary pre-concert lecture will be presented each evening at 7:15.

In addition the same program, in dress-rehearsal form, will be presented Friday morning at 11 in the hall, with refreshments to be served beforehand at 10:15 a.m. Tickets are $5 and may be purchased in advance or at the box office that morning. For information call 533-NOTE.

- A PAIR OF BYU FACULTY members will solo with the Utah Chamber Players on Saturday, Feb. 23, in the Temple Square Assembly Hall. They are violinist Nell Gotkovsky and violist Clyn Barrus, who will be heard in Mozart's Sinfonia Concertante in E flat major for Violin and Viola, K. 364. Bryce Rytting conducts the group.

An internationally recognized concert violinist, Gotkovsky has soloed with England's Royal Philharmonic and Philharmonia orchestras, l'Orchestre National de France and the English Chamber Orchestra among others. An Idaho native, Barrus is former principal violist of the Vienna Symphony and Minnesota Orchestra and currently is director of orchestral studies at Brigham Young University.

In addition Rytting will lead the group in Dvorak's Serenade for Strings. Admission is free but limited to those 8 and older.

- MUSIC OF RUSSIAN COMPOSERS will be featured on a concert by the Murray Symphonic Band Saturday, Feb. 23, at 7:30 p.m. in the Murray High School auditorium, 5440 S. State.

Under the direction of Cliff Millward, the band will offer arrangements of Rimsky-Korsakov's "Procession of the Nobles" and "Capriccio Espagnol," Tchaikvosky's "Marche Slave," Mussorgsky's "Pictures at an Exhibition," the March from Prokofiev's "The Love for Three Oranges," and the traditional "Meadowlands," among others.

Tickets are $2 , or $1 for seniors, with children under 12 admitted free.