Every mark in the painting is something you can sound. Click or tap it; hovering near one brings up its small ink control — drag the dot, or the axes themselves, to shape it.
Left–right is how fast or how much of it there is — more water, a quicker phrase, a stronger gust. Up–down is how loud.
The seven strings answer 1–7 or A S D F G H J.
Pluck a string — or drag across them, or press 1–7