シュテルン音楽院
Katz initially began studying engineering, but switched to music after one semester. He was educated at the Stern Conservatory and the Berlin Hochschule für Musik. He studied at the University of Berlin from 1918 to 1921 and then moved to Freiburg im Breisgau, where and studied with Wilibald Gurlitt at the University of Freiburg. He wrote his dissertation on 17th century music and received his doctorate in 1926.