Step

Action

1

When key is depressed, the wippen rotates, moving the jack upwards while compressing the jack spring. The hammer starts to move.

2

The wippen’s left end actuates the damper lever, lifting the damper off the string.

3

The jack reaches its motion limit point when constrained by the letoff button. Thus, the jack disengages from the hammer.

4

The hammer continues to move by inertia and hits the string.

5

The hammer rebounds until it gets caught by the backcheck.

6

If the key is still depressed, the string is free to resonate.

7

When the key is fully released, the hammer falls back into its rest place, the jack returns to its rest position and the string is damped.