BOSTON (AP) _ Ivan Alexandrovitch Tcherepnin, a composer and for more than 25 years director of Harvard University's Electronic Music Studio, has died at age 55.

He died Saturday at Beth Israel Deaconess Medical Center.

Tcherepnin was born in Paris, the son and grandson of composers. His mother, Lee Hsien-Ming, was the first woman pianist to be graduated from Shanghai Conservatory.

He graduated from Harvard, and then studied in Europe and lived for a time in San Francisco, where he worked with composers John Cage and David Tudor.

In 1996, his ``Double Concerto for Violin, Cello and Orchestra'' won the $150,000 University of Louisville Grawmeyer Award. Cellist Yo-Yo Ma, violinist Lynn Chang and the Greater Boston Youth Symphony Orchestra gave the first performance.

Survivors include his wife, Sue-Ellen Hershman-Tcherepnin, a daughter, three sons and two brothers.