Ba Dum Dum Tss
Bards can be heroic, blowing a trumpet or warhorn when the party rides forth, like Boromir sounding the Horn of Gondor and marshalling the Fellowship to battle. Bards can also move people to tears through careful playing of the lute, violin, or even a simple wooden flute, perhaps even bewitching the mind through the melody.
Or they can just bang out a simple rhythm on a drum. Pounding out a beat like the drummer on a slave barge setting the pace of the oars. Or maybe a marching band ratatat tat, ratatat tat. Yeah, I feel super inspired and ready to charge into battle…
Still better than a one-man band.