Where was the awesome piano music coming from in drums girls and dangerous pie?

In "Drums, Girls, and Dangerous Pie," the awesome piano music is coming from the character of Mr. Pignati, who is a talented musician and provides a significant influence on the protagonist, Steven. His passion for music serves as a source of inspiration and comfort for Steven during challenging times, particularly as he navigates his brother's illness. The music symbolizes creativity and emotional expression amidst the struggles the characters face.