Modest (Moisei Isaacovich) Altschuler (February 15, 1873September 12, 1963) was a cellist, orchestral conductor, and composer.
He was born in Mogilev, then part of the Russian Empire, now in Belarus, into a Jewish family. He studied at the Moscow Conservatory and emigrated to the United States in 1893. that soloists in the Orchestra included Mischa Elman, Josef Lhevinne, Sergei Rachmaninoff, and Vassily Safanov. Shilkret also noted that the Orchestra "played for the great ballerina Pavlova and her partner Mordkin [1910]."
After disbanding the orchestra on the eve of the first World War, Altschuler moved to California, where he built a notable reputation as a teacher and performer. With help from his cousin, film executive Joe Aller, he composed and performed in film scores, including The Sea Hawk (1924), Dawn to Dawn (1933), It's All in Your mind (1938), Buffalo Bill Rides Again (1947), and Song of My Heart (1948), He was also active in southern California's musical community. In 1926, he organized the Glendale Symphony Orchestra.
Altschuler founded a musical dynasty which includes his niece Eleanor Aller, his grand-nephew symphony conductor Leonard Slatkin, violinist Judith Aller, singer/songwriter Jody Cormack and composer Dylan Mattingly. Aller and her husband Felix Slatkin were principals in the Hollywood String Quartet one of America's most accomplished classical ensembles in the period 1947-1961.
Modest Altschuler died in Los Angeles on September 12, 1963.