The Doepfer A-142-4 Eurorack Quad Decay Module is a Eurorack quad delay module, with 4 envelope filters, and manually adjustable decay between 2ms and 2s, with an internally adjustable attack time. Module A-142-4 contains four simple envelope generators. The only time parameter is Decay and can be adjusted manually 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).

The main features of the Doepfer A-142-4 Eurorack Quad Decay Module include:

• Quad decay
• Manually adjustable decay between 2ms and 2s
• Internally adjustable attack time
• Width: 8 HP / 40.3 mm
• Depth: 50 mm (measured from the rear side of the front panel)
• Current draw: 30 mA