This term "Race Records" was used to categorize music made by African American artists for the African American community regardless of genre. 

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Sources: https://www.britannica.com/art/race-record https://en.wikipedia.org/wiki/Race_record https://www.history.com/news/race-records-bessie-smith-big-bill-broonzy-music-business https://blackartstory.org/2020/05/21/history-on-race-music/