Louis Armstrong (4 August 1901 July 6; 1971); nicknamed Satchmo or Sachimo and Pops; was an American jazz trumpeter and singer.Coming to prominence in the 20s as an innovative cornet and trumpet virtuoso; Armstrong was a foundational influence on jazz; shifting the music-s focus from collective improvisation to solo performers. With his distinctive gravelly voice; Armstrong was an influential singer; demonstrating great dexterity as an improviser; bending the lyrics and melody of a song for expressive purposes. He was also greatly skilled at scat singing; or wordless vocalizing. Nobody Knows the Trouble I've Seen is a spiritual. The song is well known and many cover versions of it have been produced, although the rendition by Louis Armstrong is the best known. Marian Anderson had her first successful recording with a version of this song on the Victor label in 1925. Lena Horne recorded a version of the song in 1946. Deep River Boys recorded their version in Oslo on August 29, 1958. It was released on the extended play Negro Spirituals Vol. 1 (HMV 7EGN 27). The song was arranged by Harry Douglas.Louis Armstrong (4 August 1901 July 6; 1971); nicknamed.