Some re-enactors have formed camp bands to play music that soldiers enjoyed hearing around battlefield campfires. The most popular tunes included songs from the minstrel stage.
Groups such as the 2nd South Carolina String Band pride themselves on their accurate impressions — right down to the exaggerated black dialect of songs with inescapably racist overtones.
Unfortunately, the AP story is short and underdeveloped. However, here’s an interview with the 2nd South Carolina String Band, an interview which jaw-droppingly openly discussed the performance of minstrel songs without a single mention of the racism of the time.