The idea behind Emoticons is to symbolically represent emotions and this last movement is Euphoria. As you can see and hear, it is in a fast tempo and is in a rondo form ABACABA. The tonality is major with some borrowed chords to spice things up. There are frequent modulations to add variety to the tonality.
The A section is very rhythmic as it alternates meters of 6/8 with meters where the quarter note gets the beat. The eighth note remains constant throughout these meter changes. I used 2/8 instead of 1/4 because I thought it would be less confusing, but the 2/8 has one quarter note beat in it. Sudden shifts in dynamics are used in the A sections to add interest since the A section occurs four times.
The B sections also have meter changes but the quarter note beat dominates with an occasional 3/8 thrown in.
The C section is the central section and is in 4/4 time and more legato for contrast. It begins with the two tubas, then adds canons with the top three instruments while the 2nd tuba does a staccato accompaniment, and finally the melody appears in the 2nd euphonium while the other parts accompany. The A and B sections are primarily C major while the C section explores the mediant keys E major and Ab major, before moving to A major for the last statement.
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