The Barlow Endowment for Music Composition at Brigham Young University has received an additional $500,000 from the man who donated a million dollars to endow it in 1983.

Milton A. Barlow's new gift increases the endowment by 50 percent at a time when falling interest rates have made it increasingly difficult to continue the endowment at the expected level, said BYU composer emeritus Merrill Bradshaw, who administers the program.For 12 years the endowment has been used to award more than $500,000 in commissions to more than 100 composers worldwide. Its objective is to encourage and support excellence in musical composition.

Composers commissioned have ranged from Pulitzer Prize winners like Joseph Schwantner, William Bolcom and Bernard Rands to such international composers as Henryk Gorecki and Gyorgi Ligeti and young composers like Augusta Read Thomas and Daren Hagen.

An additional arm of the endowment is an international composition competition with an annual prize of $10,000. In this program, the endowment has been associated with the St. Louis Symphony, the Baltimore Symphony, the Dale Warland Singers, the Minnesota Orchestra, Chamber Music America, the College Band Director's National Association and the Los Angeles Philharmonic Orchestra's New Music Ensemble.

The endowment also provides funds to enrich the composition program at BYU.

Barlow established the endowment with his wife, the late Gloria Barlow. He remains active in a Washington, D.C., development business.