It is crucial to maintain a consistent tempo, avoiding any slowing down or speeding up. It is important to prevent the tempo from dropping when encountering difficult passages, and even if it doesn't drop, to avoid a heavy sound. However, playing lightly can sometimes result in a lack of a solid, resonant tone (regardless of piano or forte). I will explain methods to resolve such issues.

This piece is characterized by the presence of repeated notes, known as pedal points (also called organ points). For example, in measure 8, the upper note in the right hand continuously plays C while the lower notes move. There are two practice methods for this:

• One method is to place the 5th finger (assuming it is the 5th finger) on C, press the key down, and keep it there without moving it. Then, play only the moving inner voices forte, at an excessively fast tempo (much faster than the actual tempo).
• Next, using a sharp, reverse-dotted rhythm (e.g., FC. EC FC. GC. AC. GC. FC EC), accent the upper note played by the 5th finger with fortissimo. At this time, the inner voices do not need to be played forte. The main goal is to ensure the 5th finger strikes the key firmly.

These two patterns—one emphasizing the moving voices, the other emphasizing the repeated note (pedal point)—are practice methods. By mastering these, you will be able to produce a solid, resonant tone no matter how lightly you play (and the sound will certainly not disappear).

These methods are particularly effective in preventing the left hand from becoming heavy. For your reference.