The 1867 music book,
Slave Songs of the United States,
is part of the Documenting the American South collection. See the Primary Source Sets tab for the entire collection.
This webpage contains a complete scan of the book, along with transcribed text, notes, descriptions, and sheet music.
The National Museum of African American History and Culture in Washington DC, part of the Smithsonian Institution and colloquially known as the Blacksonian, has an extensive YouTube page, including a playlist of songs curated for Juneteenth 2024 celebrations. Please find this playlist at the link below, and more information at the museum in its page on this LibGuide.