He began playing music with several of his schoolmates; the baritone horn was his first instrument.
Lee focused on music the first few years and played the alto, French, and baritone horns.
Having originally learned to play the baritone horn, Greenwood switched to guitar following high school.
He also played baritone horn in brass bands in his youth, already a professional musician by 1920.
He also played baritone horn in the university marching and concert bands.
Soon afterwards, he learned to play the piano, and also played baritone horn in the high school marching band.
At age 12, he started lessons on valve trombone and the larger baritone horn.
He also played the baritone horn in the town band, and eventually became the conductor.
The baritone horn has largely receded into the background in the concert band world of today.
The instrument is very similar to the baritone horn and helicon.