Instrumentation
Instrumentation of the Marching Illini is based upon the composition of a typical concert band, but modified in several ways to support outdoor performance. Piccolos are used instead of flutes. Mellophones replace the . A larger-than-usual section of metal sousaphones adds a deeper low brass sound, not to mention visual interest. The band has a higher-than-usual proportion of low- and mid-range brass instruments (baritone, trombone, sousaphone, and mellophone) and the complete woodwind section that allows the band to play traditional concert band repertoire (unlike all-brass marching bands). An auxiliary flag corps and female dance squad (dubbed the "Illinettes") contribute another visual element to the band's performances.
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