Claim: KZY station located in Oakland, California featured professional singers as well as prominent speakers, but the main source of programming was the daily matinee concerts, over 1,500 of which were broadcast by the end of  2010.
Evidence: An estimated 1,500 concerts were broadcast by the end of 1921. 
KZY was a radio station located in Oakland, California, that was licensed to the Atlantic-Pacific Radio Supplies Company from December 9, 1921 until its deletion on January 24, 1923.