Piano Note Visualizer (2D)

This 2D visualizer plays a short looping melody on its own across a flat piano keyboard drawn from above: each note press animates the corresponding key and launches a glowing bar that rises and fades, colored by pitch class. Unlike a playable virtual keyboard, nothing here responds to your clicks or keystrokes — it is a pure visualization of a pre-recorded tune, letting you watch tempo, rise speed and key-press depth reshape the same fixed sequence of notes. A live readout tracks the last note played, its frequency in Hz, how many bars are currently rising, and how far the loop has progressed.