Triple AD is a module of three independent AD envelopes. ATTACK and DECAY times can be adjusted with the slider, and no sustain is performed. Each channel can also have a cycle mode in which attack → decay is repeated with a switch, in which case it can be used as a unipolar LFO. The LED shows the state of the envelope, making it highly visible. In addition, the range of attack / decay time can be changed with the range switch for each channel. The height of the envelope is 3V.