This collection of functions allows for some. In addition, because this is a passive circuit (no power is applied to it), its sonic characteristics are somewhat dependent upon the audio signal you feed into it, making it a very natural and organic way to shape a signalвЂ™s volume and tone. The Shifty is essentially a combination of four sample and hold stages, a sequential gate and sequencer controller. Exciting the vactrol (via the CV input) with a trigger, noise blast, or short envelope will result in a very natural sounding filtered envelope thatвЂ™s reminiscent of the sonic characterics of struck objects, which are allowed to decay naturally. This makes LPGs sound very different (and more вЂњacousticвЂќ) than the traditional complement of envelopes, VCFs and VCAs that are employed in most subtractive synthesizers. At +5V, the gate is fully open and the input signal is passed through to the output. Really pentatonic and fast kind of thing, but each voice has it's own envelope and it sort of sounds like subtle echo or something. Increasing amounts of positive CV open the gate - making the output signal both louder and brighter. The lead part is a shifty in shift register mode, over 3 voices. Without positive control voltage, the gate is completely closed and none of the LPGвЂ™s input signal is passed through to the output. The Intellijel Passive Low Pass Gate 1U is a simple, vactrol based, 1-pole, passive low pass gate, which is controlled by an external CV input. Indeed, low pass gates are the main ingredient of the so-called вЂњBuchla BongoвЂќ sound. This sonic coupling of timbre and volume, along with the circuitвЂ™s natural decay, makes the low pass gate particularly adept at producing tones associated with struck objects, like hand drums or marimbas.

What makes vactrols particularly unique (and well-suited to musical applications) is their non-linear response to voltage - in particular, the way in which the internal LED slowly dims (rather than shutting off instantly) when the control voltage is removed. Applying a control voltage to the vactrol lights its internal LED - the brightness of which is measured by its detector. Encased within a vactrol is both a light source and a light detector. Traditional Low Pass Gates use vactrols to control the opening and closing of the filter. As the gate opens further, the output grows louder and its high frequency content increases. Shifty is a combination of four sample and hold stages, a sequential gate, and a sequencer controller. As the gate begins to open, the lowest frequencies pass through to the output. When the gate is closed, no frequencies are allowed to pass through (and no output is heard). This collection of functions allow for some. In general, low pass gates (LPGs) control the amplitude and timbre of a signal by opening and closing a low pass filter. The Shifty is essentially a combination of four sample and hold stages, a sequential gate and sequencer controller.

Intellijel shifty