What are the two basic functions of all the instruments in a jazz band or wind band?

What does Marsalis use as a visual example to explain the varying registers of the instruments of the wind band?

A concert band, variously also called a wind ensemble, symphonic band, wind symphony, wind orchestra, wind band, symphonic winds, symphony band, or symphonic wind ensemble, is a performing ensemble consisting of members of the woodwind, brass, and percussion families of instruments, and occasionally including the double bass or bass guitar. On rare occasions, additional non-traditional instruments may be added to such ensembles such as piano, harp, synthesizer, or electric guitar. A concert band's repertoire includes original wind compositions, transcriptions/arrangements of orchestral compositions, light music, and popular tunes. Though the instrumentation is similar, a concert band is distinguished from the marching band in that its primary function is as a concert ensemble. The standard repertoire for the concert band does, however, contain concert Ellis Marsalis began as a tenor saxophonist but switched to piano while . Branford Marsalis started out playing soprano, alto, and tenor saxophone

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