When the saints go marching in

"When the Saints Go Marching In" is traditionally performed in the key of F major. The origins of the song are unclear, but it is believed to have roots in African-American spirituals and gospel music. Louis Armstrong popularized the song with his recording in 1938, showcasing his iconic trumpet playing and distinctive vocal style. While the composer of the song is unknown due to its folk origins, it has become a classic of traditional jazz and gospel music. Interestingly, "When the Saints Go Marching In" is often played as a funeral dirge in New Orleans jazz funerals but is also performed in a lively and celebratory manner during other occasions. The melody features a catchy and repetitive refrain, making it easily recognizable and beloved by audiences worldwide.