Plum AudioADVA 1U Analog Multimode Filter
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Plum Audio ADVA 1U
Possibly the most fully-featured yet compact filter module ever devised, Plum Audio's ADVA 1U is a multimode analog filter boasting impressive digital control and interfacing, all packed into a 1U Eurorack module. With a signal path that's completely analog from start to finish, ADVA makes use of Plum Audio's ClickKnobs and some digital control wizardy for a highly compact control interface. Concentric pots for stacked controls with push-button functionality give you three parameters in one knob—talk about bringing new meaning to knob-per-function! Use the upper controls to set filter Cutoff, Resonance, and level for the internal Noise generator, while the lower controls set Input and Output levels, as well as the amount of modulation passed in from the FM input. Tap the knob in the middle to scroll between the seven different filter modes, and explore all the ways that ADVA can shape your sounds.
ADVA 1U Features
- Multimode analog filter in 1U format
- Features 3 of Plum Audio's ClickKnobs: custom concentric pots with push button functions
- Controls for filter Cutoff, Resonance, FM amount, Noise level, Input level, and Output level
- 7 different filter modes: Lowpass 6dB, Lowpass 12dB. Lowpass 18dB, Lowpass 24dB, Bandpass 12dB, Bandpass 24dB, and Highpass 12dB
- Separate pre-filter Drive and post-VCA Distortion circuits
- MCV mode allows for modulation of filter mode with CV
- Eurorack module
- Width: 22hp
- Depth: 35mm
- Current draw: 110mA @ +12V, 50mA @ -12V
With 7 filter modes, ADVA provides high richness and a wide variety of tones; it can filter gently like an LPG or it can be pushed up to the edges of hot acid tones.
Self-Oscillation is available for all modes, producing a range of waves from clean sine waves up to soft square waves when activating the post-distortion circuit. Together with V/OCT tracking, ADVA works brilliantly as an oscillator or as a percussive sound generator.
A resonance loudness compensation circuit ensures that ADVA does not compromise on volume when the resonance is increased.
An Internal analog white noise generator is the little bit of spice that can make the world of difference. Blend it together with the input signal by rotating the dedicated knob to add more richness to your sound and further emphasize cutoff movements, or use it as an FM source to achieve the different flavors of dirty tones.
ADVA is packed with two separate distortion circuits. First, the soft-clipping overdrive is located in the sound path after the white noise blend knob and the input gain knob, a circuit which can push the incoming signal to thicken any waveform. If you blend the input with the noise generator it can compress the noise and exaggerate it to achieve more aggressive levels.
The second (post) distortion is located after the VCA, just before the output. This is a more aggressive distortion and can be used for acid and other dirty hot tones.
Although the sound path is completely analog, ADVA has a digital support circuit that enables a smart routing system with the option to modulate filter modes via CV, and a very intuitive interface that includes 3 CLICKKNOBS and an RGB LED ring that provides visual feedback for whatever state the filter is in.