DISC Pittsburgh Modular Lifeforms Dynamic Impulse Filter (8HP)

Full Description

Evolving The Low Pass Gate

For years low pass gates have used a light dependent resistor called vactrol to impart a magical, organic response onto a sound that many people have come to love. The Dynamic Impulse Filter replaces the vactrol with a modern analog circuit and creates a response time that is not static like the vactrol but instead is tunable. At the core of this filter is a Sallen-Key topology that is used to produce a smooth two pole filter that self-oscillates at high resonance.

Dynamics Response Control is Key

The response time of the Dynamic Impulse Filter is tunable allowing the response module to adapt to any musical context. The Dynamic Impulse Filter provides a natural characteristic much like when percussive instruments are hit. Their decays take on the characteristic of a low pass filter when they decay with the high harmonics fading out. Turning the dynamic response knob allows you to control the decay time related the impulse gate input and dynamic CV input and tune it to that you can replicate various percussive sounds.

Mode Switch and Dynamics Knob

The large dynamics knobs can be used to control the center frequency of the filter when in filter mode. In VCA mode, it controls the pass through signal level and when in low pass gate mode it controls both the center frequency of the filter and the pass through signal level at the same time.

Shared Response

The Dynamic Impulse Filter features a response output that can be used to control other modules that utilise vactrol. This allows for the response of a static vactrol to become adjustable as the response output of the dynamics impulse filter superimposes the variable dynamics response onto vactrol based modules, opening up a whole range of possibilities for other vactrol based modules.

Features

• Versatile filter module
• Natural and energetic sound
• All analog design
• Utilises entirely new, all analog design to replicate the impact transients and vibrance of a percussion hit
• 3 modes: resonance low pass filter, high quality VCA, combined low pass gate mode
• 2 pole filter that self oscillates at high resonance settings
• Wide sonic palette with smooth frequency sweeps and aggressive resonance
• Uniquely emulates everything from, kicks, toms, expressive hand drums
• Response output superimposes variable dynamics response onto vactrol based modules
• Dynamic response knob to set decay time
• Response time becomes tuneable
• Resonance attenuator

Specifications

• Size: 8hp
• Depth: 20mm
• Power: +12V 35mA, -12V 35mA, Does not require +5V. Reversed power polarity protection