"In the Mood" is a big band era #1 hit recorded by American bandleader Glenn Miller. It topped the charts for 13 straight weeks in 1940 in the U.S. and one year later was featured in the movie Sun Valley Serenade. In 1999, National Public Radio (NPR) included the 1939 Glenn Miller recording on RCA Bluebird on the NPR 100, the list of "The 100 most important American musical works of the 20th century". "In the Mood" opens with a now-famous sax section theme based on repeated arpeggios that are rhythmically displaced; trumpets and trombones add accent riffs. The arrangement has two solo sections; a "tenor fight" solo—in the most famous recording, between Tex Beneke and Al Klink—and a 16-bar trumpet solo. The arrangement is also famous for its ending: a coda that climbs triumphantly, then sounds a simple sustained unison tonic pitch with a rim shot. Source: en.wikipedia.org/wiki/In_the_Mood