In the 1930s, big bands and swing music were popular, with Duke Ellington, Benny Goodman, and Glenn Miller popular bandleaders. In the 1940s, the bands started to break up, and band singers like Frank Sinatra and Sarah Vaughan went out on their own. War songs became popular.
The texture would be heterophony, if the musicians have used
the same melody in unison. This type of texture has a line of which it only has
a single melody with its simultaneous variations. This type of texture could be
incorporated with two or more performers.