[2] He told writer Khaver-Paver that his grandfather sang folk songs and workers' songs to his students when Moyshe was young, and the heartfelt tunes were in my blood, and that it was from his other grandfather "Yosl der poylisher" and his father "Zelik der poylisher" that he inherited his gift as a chazan.

He started acting in school and played a few roles in the poet Eliezer Steinberg's Der Berditchever Rov ("The Rebbe from Berdichev").

[3] He was allowed into the Canadian Actors' Union in 1924 and played in the Montreal Yiddish theater under the direction of Isidore Hollander.

[5] In 1931, he was accepted into the New York Actors' Union and played in Anshel Schorr group, and lived in Philadelphia for a time.

[4] He then played with Boris Thomashevsky, then in 1932, he started his own company and traveled to Buenos Aires and across Argentina, Uruguay, and Brazil.

[1] Returning to the U.S., he worked on the radio and starred with his wife in the Harry Kalmanovitsh - Joseph Rumshinsky operetta Dos heyst gelibt (This is what's called being loved).

Around the same time, with the encouragement of friends, he applied to conduct services as chazan for the High Holidays at the First Roumanian-American Congregation, in Manhattan, New York, on the Lower East Side and caused a sensation,[10] being perhaps the first singer to step from "the bine" (stage) to "the bimah" (pulpit).

In 1943 Oysher signed a contract with Fortune Gallo to perform several roles with the Chicago Opera Company and a fine career was foreseen, but after a heart attack he had to abandon the idea; he continued to work in radio and as a chazan and recording artist until, after other heart attacks, on the advice of his doctors, he entered semi-retirement.

He leaves his job as the Vilnius cantor, and seems at first to be on the path to fame and fortune as an opera star in Warsaw, when the news arrives that his son has died.