Trumpet Duet Trumpet - Level 3 - Digital Download SKU: A0.897961 By Chicago. By Robert Lamm. Arranged by Marc Gumberg. Pop,Rock. Score. 5 pages. Marc Gumberg #4265191. Published by Marc Gumberg (A0.897961). This is an intermediate level trumpet duet arrangement of Chicago's 25 or 6 to 4. A lot of fun to play with your trumpet teacher or another student. Great for recitals! Range is up to an A above the staff, this arrangement will challenge your endurance, and help you work with your double tounging. Lead is split between both parts, trumpet 1 & 2. If your a trumpet player & you are not familiar with the band Chicago you should definitely seek out a recording of this song as well as other Chicago songs. Every aspiring trumpet player should be familiar with this band!