Pittsburgh Modular Lifeforms Dynamic Impulse Filter Eurorack Variable Lowpass Gate Module

8HP x 20mm Tunable Variable-response Lowpass Gate Eurorack Module with 3 Operation Modes
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Pittsburgh Modular Lifeforms Dynamic Impulse Filter Eurorack Variable Lowpass Gate Module image 1
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Pittsburgh Modular Lifeforms Dynamic Impulse Filter Eurorack Variable Lowpass Gate Module
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Essential Percussive Transient Shaper

In theory, shaping oscillators into percussion sounds is easy. But it takes a special tool to really make your impulses pop. Pittsburgh Modular's Lifeforms Dynamic Impulse Filter adds organic, sharp transient shaping to your Eurorack synth rig. Choose from three modes — resonant lowpass filter, VCA, and lowpass/gate — to develop energetic percussion hits. Its uniquely tunable design delivers all the coveted vactrol-resistor sound, without the wild variations and instability of a light-dependent resistor. The result is a musical, stable, and dynamic variable-response lowpass filter that takes up a mere 8HP in your Eurorack system.

Superbly dynamic filtering

The snap of a snare drum, the thrum of a tom, the chest-pounding impact of a kick, or the ringing resonance of an agogo — if you can imagine it, the Dynamic Impulse Filter can help you create any percussion sound you can dream up. On the most fundamental level, the Dynamic Impulse Filter is based on classic Sallen-Key 2-pole topology, which delivers smooth lowpass filtering that can self-oscillate at high resonance settings.

Between the Dynamics CV input and the Dynamics knob, which lets you set the dynamics center frequency, you can completely tune the effect. And since you can choose between applying just the filter, just the VCA dynamics, or both at once, the level of control you get from the Dynamic Impulse Filter is simply staggering.

Vactrol-free tunable filter

We get it — vactrols are cool and many of the dynamic filter modules the synth geeks here at Sweetwater love are based on these light-dependent resistors. The trouble is that they tend to be a bit erratic. That's why Pittsburgh Modular decided to go with a custom design which resulted in their Dynamic Impulse Filter.

Not only is the Dynamic Impulse Filter significantly more consistent from one unit to the next, but it's also far more stable than a traditional vactrol filter. At the same time, this all-analog filter provides the sonic magic you want, plus the consistently tunable response you need to make your shaped sounds truly musical.

Vactrol-enhancing design

Speaking of vactrols, if you happen to use other Eurorack modules that do include vactrols, you'll be delighted to discover the Dynamic Impulse Filter's shared response function. By patching its response out into your vactrol-based filter modules, you can effectively take over any static vactrol circuit. So once you add a Pittsburgh Modular Dynamic Impulse Filter to your rig, you get a whole lot more than just an amazing transient shaper.

Pittsburgh Modular Dynamic Impulse Filter Features:

  • Powerful variable dynamic lowpass filter in an 8HP/20mm Eurorack module
  • 2-pole lowpass filter features Sallen-Key topology capable of self-oscillation
  • VCA dynamics provide transient shaping that's perfect for drums and percussion
  • 3 operation modes let you choose between filtering only, VCA dynamics only, or both
  • Vactrol-free analog circuitry provides smooth and consistent dynamic filtering
  • Response output lets you tune and control external static vactrol filters

Tech Specs

Type Dynamic Impulse Filter
Modular Yes
Frequency Controls Center frequency control
Depth 0.78" (20mm)
HP Size 8HP
Power Usage ±12V DC, 35mA
Power Supply Requires Eurorack case / power supply
Manufacturer Part Number DYNAMIC

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See also: modules for eurorack, Pittsburgh Modular, Pittsburgh Modular Eurorack Modules