The Mills Brothers, sometimes billed as The Four Mills Brothers, and originally known as The Four Kings of Harmony, were an Afro-American jazz and pop vocal quartet of the 20th century who made more than 2,000 recordings that combined sold more than 50 million copies, and garnered at least three dozen gold records. The Mills Brothers were inducted into The Vocal Group Hall of Fame in 1998.
had their own popular radio series in 1932–1933, one of the earliest built
around a black act, billed as the "Four Boys and a Guitar." Before
their show announcers commonly explained to listeners that the only instrument was
a guitar, as the vocal effects made many listeners think they were hearing a
muted trumpet, saxophone, and string bass or tuba.
Brothers - Bugle call rag (1932) (Rex 8896_A)