In what style would a musician play if instructed with "alla marcia"?

When a musician is instructed to play "alla marcia," they are being directed to adopt a march style. This instruction indicates the piece should embody characteristics typical of a march, which typically includes a strong, steady, and pronounced beat, often in duple time. Marches are usually performed with a sense of forward momentum and are often used in ceremonial contexts or for military purposes.

The march style typically features a consistent, pronounced rhythm that emphasizes the strong beats, creating an uplifting and often celebratory or formal atmosphere. This is contrary to other styles that might focus on more fluid or lyrical playing, which would not be suitable for this directive. Consequently, the interpretation of "alla marcia" as a march style ensures that the performance aligns with its intended character and mood.