Dan Presgrave, instrumental music coordinator for the Department of Music in Arts & Sciences, conducts the 70-plus-member orchestra.

The program will open with Tchaikovsky's colorful Capriccio Italien and also features the Concerto Grosso No. 1 by the Swiss-American Bloch (1880-1959).

The latter work, written in 1925, mixes the modern piano and the concerto grosso, a genre typically employed for string orchestra and popular in the Baroque era. This compelling, anachronistic instrumentation was one reason the piece was frequently performed throughout the middle part of the 20th century.

Pianist for the concerto grosso is Mark Tollefsen, a junior in Arts & Sciences studying piano with Seth Carlin, professor of music.

Tollefsen was soloist with the orchestra as a sophomore and also has appeared as soloist with the Saint Louis Symphony Orchestra.

He was a finalist in the Stravinsky International Piano Competition and placed third in the Music Teacher's National Association, Midwest Regional Competition.

The St. Louis resident is the son of Douglas M. Tollefsen, M.D., Ph.D., assistant professor of biochemistry and molecular biophysics in the School of Medicine.

Also on the program is Where the Rivers Run by St. Louis composer Spears, who has taught at Webster University and other area colleges and has written commissions for several area churches.

The performance is free and open to the public and is sponsored by the Department of Music.

For more information, call 935-4841 or email staylor@wustl.edu.