Jewish music researcher & collector. Born in Lodz, Poland. Studied in Moscow, and in 1923 moved to the US. Worked as an organist in various synagogues and was one of the founders of the American Musicological Society. His research deals with theories of tonality, Russian music, and Jewish music (Biblical instruments, Biblical cantillation, etc.)
The Joseph Yasser Collection exists at the library of the Jewish Theological Seminary. An inventory of his collection, including a longer biographical note about Yasser, can be found here.
For Yasser's works, see: Selected writings and lectures of Joseph Yasser.