The AQB_MOD is an add-on board that adds modulation capabilities to the Aquaboy (DM-2) project. The 2019 version includes an optional LED that displays the modulation rate and an additional resistor to limit the depth control.

The AQB_MOD features three controls:

1. RATE: This control sets the modulation rate, allowing you to adjust the speed of the modulation effect from slow to fast.

2. DEPTH: The depth control adjusts the intensity of the modulation effect, ranging from minimum to maximum.

3. SW: The switch is used to toggle the modulation effect on and off.

With the AQB_MOD installed, you can easily add modulation to your Aquaboy pedal, enhancing its versatility and creating unique soundscapes.

Summary created by AI from the original source.