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Module A-142-4 contains four simple envelope generators. The only time parameter is Decay and can be adjusted manuall by means of the Dec. control in the range 2 ms … 2 seconds. The attack time can be adjusted internally by means of a separate trimming potentiometer for each sub-unit in the range 1 ms … 15 ms. The factory setting is about 3 ms. This is the attack time of the TB303. Each envelope output has a LED control available. The trigger inputs are normalled (1 -> 2 -> 3 -> 4).
Specifications
Width: 8HP
Depth: 50mm
Power: +30mA (+12V) / -10mA (-12V)
Manufacturer product page here.