GEMINI 2412 Dual SEM VCF Sequencer Tweaking #eurorack

video upload by AJH Synth Official

"Some 70's-inspired tweaking with the GEMINI 2412, SAMPLE & Hold, and a Sequencer.
Video & Performance by ‪@DreamsOfWires‬
The Gemini is based on the classic Oberheim SEM filter, but with expansive flexibility, including a unifying CV and Audio mixer section between the two multi-mode VCFs. There is a shared output for both filters in 'Dual' mode as used here, but also separate shared outputs for each VCF, through which filter mode can be selected, and individual outputs for LP, BP and HP filters on each.
Also, a jumper on the back alters the behaviour of both filters individually - standard SEM resonance range, or extended high resonance setting that'll allow the filter to self-oscillate. 1V/Oct inputs are present for both filters, so each can even be used as a simple sine wave oscillator over a few octaves.

AJH Synth Eurorack modules used:
Vintage Transistor Core VCO
Gemini 2412 Dual State Variable Filters
Discrete Cascaded VCA
Dual LFO + VCA
SAMPLE HOLD + SLEW
RING SM (Moog CP3 mixer/sub bass generator/ring modulator)
DH-ADSR (looping envelope generator)

Other gear:
‪@vermonagear‬ DSR-3 Stereo Spring Reverb
‪@solidstatelogic‬ BigSix Mixer & Audio Interface
Eurorack Case by @Casa_Modular_ (Instagram, Reverb, Etsy)
Case Power by ‪@konstantlab2976‬

#modularsynth #synth"

Stupidly useful, simple & small // Low Fat VCF from AJH Synth

video upload by DivKid

"Here's a fun one and something stupidly simple, really easy to use, small, affordable but way more useful than you might think. It's the Low Fat VCF from AJH Synth, which is a 2HP non resonant (it's supppppeeeer smooth) high pass filter.

I think my favourite thing is using it to pair with low pass filters and to make a variable width band pass filter. It's also nice as a simple "clean up the mix" tool, as a pseudo spectral sidechain, multiband ducking style device or just for performance sweeping low end out of things."

"The Low Fat filter packs a switchable 6dB and 12dB slope High Pass Voltage controlled Filter into a miniscule 2HP of rack space, with a very low power consumption of less than 12mA per rail.

Sometimes there is just too much bottom end in a patch and it swamps everything else, by feeding it through the Low Fat Filter we can remove some of this bottom end to balance things up.

It also makes a great companion to the MiniMod Transistor Ladder Filter and can be placed before or after this in a patch to create a Band Pass filter with a variable passband and a choice of a softly rolling 6dB slope or a stronger 12 dB slope.

It's a great way to populate one of those frustrating gaps in your eurorack modular case with something that is deceptively usefuI.

In Depth

The LOW FAT is a new 2hp Eurorack module by AJH Synth, it's a High Pass filter, with frequency control by either manual pot, and/or external CV with attenuator. It's intended to compliment other filters, particularly low pass VCF modules, in practical tasks such as removing excessive low frequencies, for example when the bass is swamping a mix. It can be switched between 6dB (1 pole) response and 12dB (2 pole) response.

By patching a CV signal to the FCV input it can be voltage-controlled and used musically as with any other VCF. When used in conjunction with a LP filter it forms a fully customisable band pass filter, allowing the range of passbands to be cherry-picked. Feeding in a 1V/Oct pitch CV and setting the FCV pot to a suitable level allows it to track an incoming pitch CV, so the amount of High Pass filtering remains constant as the pitch of the incoming VCOs traverse up and down the frequency range. This can be particularly useful in creating percussive sounds, such as snares and hats, but also on sequenced bass lines. Since it is only 2HP it's a great way to occupy one of those frustrating gaps in your eurorack modular case with something that is deceptively useful, and adds another dimension to the classic bass monster that is the Transistor Ladder Filter."

Kenton USB Solo mk2 MIDI to control voltage review + Big Merp Cameo 😺

video upload by CatSynth TV

00:00 Introduction
00:18 Overview
00:55 MIDI-to-CV demo with note, control change, and aftertouch messages
06:49 Saving configurations as presets
07:42 Converting MIDI clock to CV for synchronization
09:45 Conclusion

"In today's demo and tutorial, we have a bit of fun with the new USB Solo mk2 from our friends at Kenton Electronics. The handy little gadget builds on Kenton's previous MIDI to CV converters, and allows one to convert MIDI from USB or 5-pin DIN to a variety of CV signals, including pitch (1V/Oct), gate and trigger, 3 aux channels for CC, velocity, aftertouch, and more. It also supports MIDI clock, allowing one to synchronize Eurorack and other analog synthesizers with your DAW or MIDI sequencer. Additional features include a built-in LFO and envelope.

Big Merp decided he wanted to be a part of this demo, too 😺"

Patreon: / catsynth | https://shop.catsynth.com | https://ko-fi.com/catsynth

introducing splines

video upload by Þ

"A first tour of the new splines eurorack module by thorn.audio out now.
For more information please visit the manual page at:
://thorn.audio/splines"

This one was sent my way via Meska.

"Splines is a visual vector curve generator in Eurorack format, with a wide frequency range and a built in quantizer, cv scope and cv processing capability.

It can be used in ways similar to a wavetable VCO, LFO, step sequencer or envelope generator.

Onboard quantizer scales, backups and firmware updates are managed as you would use an external USB drive.

It’s a small, shallow, multifaceted addition to any setup, and for touring rigs it can fill many roles in exchange for little space and weight.

in depth.
In the technical sense "splines" are most commonly used in 3d modelling, animation and vector graphics. It's essentially just a way of creating a curved path from one point to another.

In this module, you have up to sixteen user configurable points or nodes which function much like a step sequencer, where the X axis represents time and the Y axis represents voltage.

When the phase(time) reaches the X position of a node, the 1v/oct output changes to the Y position value of that node.

Each of the sixteen nodes also has a configurable trigger setting, determining if the gate output goes high when the phase crosses the X position of the node.

The nodes are connected by a spline and the shape of this spline is determined by three parameters; Tension, Continuity and Bias. The spline output gives you a voltage following this curve.

Tension changes how extreme the curve between the nodes is.

Continuity sets the angle of the spline at the node.

CLICK FOR MORE »

BUCHLA Ziggy Sound DEMO & Walkthrough — Superbooth 2026

video upload by Hispasonic

"At Superbooth 2026, Buchla unveils Ziggy: their most portable and accessible analog desktop synthesizer to date. Filmed at the Buchla booth in Berlin, this video walks through the instrument's main features and includes a full sound demo.

Ziggy distills the DNA of classic Buchla instruments into a compact, immediately playable format: complex oscillator, modulation oscillator, Cycler (envelope + pulser, à la 208c), lowpass gate and a stereo digital effects section with a brand-new ping pong delay. All modulation routing — normally done with patch cables on a Buchla — is handled through flexible assignments from the panel and the oscilloscope screen.

KEY FEATURES
Fully analog signal path + digital stereo effects True analog bypass (voltage divider) when dry is at zero "Programs" designed as a starting point, not as closed presets Fader quantization to scales (pentatonic minor, etc.) Oscilloscope screen doubles as the programming and mod-assignment display

CONNECTIVITY
USB-C (power + MIDI) plus a second USB-C dedicated to power 3.5 mm TRS Type A MIDI and 5-pin DIN MIDI
Eurorack patch points: gate, modulation, pressure and 1V/oct
Aux audio input and stereo outputs

PRICE AND AVAILABILITY
$999 street price. Available for pre-order, first units expected late summer / early fall 2026"

Get lost in Sound Effects with Nyquist Nightmare

video upload by Robots Are Red

"Nyquist Nightmare by Modular 4 the Masses
12hp Wacky FM Synthesizer designed to emulate the sounds of scanning radio frequencies and more!"

Modular for the Masses

Nyquist Nightmare

Audio Mangling Modulator/Demodulator

This module is a modulator/demodulator. The top four knobs interact with each other to take a signal and mangle it beyond all recognition, or if you're patient and lucky, let the signal come through mostly unchanged.

What is going on there? you ask. The input is used to frequency-modulate a VCO that can oscillate beyond anybody's hearing range. The resulting (possibly ultrasonic) signal frequency-modulates a second identical VCO. This leads to the kind of signal degradation you might expect from an AM radio transmission. Or a short wave signal fighting its way through a hurricane.

The rest of the knobs control filtering; high-pass to remove the truly ground-shaking rumbles the top for knobs can generate, and resonant low-pass to get the harsh high pitches out of the signal, and emphasize (for example) the frequency range of human speech, if you want to pass old movie dialogue through this.

Also included are a wet/dry control (while prototyping this module I would sometimes spend minutes looking for the perfect knob settings to allow a signal through just to realize the signal source had stopped playing), a CV input for the low-pass filter with an attenuator knob, and a effect volume knob.

Some fun things to try:

with zero input, try to get a modem sound!
connect a simple waveform and massage the top four knobs to fold the wave in surprising ways
David Lynch. Put David Lynch through this.
turn the resonance of the low-pass VCF up and use this as a VCO (not 1V/oct, I'm afraid
Turn both "Carrier" knobs all the way down, so the VCOs are stalled, and listen to the signal bash its way through

http://hivemindsynthesis.com/m4tm

Analogue Solutions Colossus AS100 Classic

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Additional CONTROL Listings

"Fully tested. Includes brand new set of Black 0 Ohm pins and Red 10k Ohm Pins. Shipping rates are arbitrarily set. Email or message us for crated rates, LTL shipping rates, and alternative payment methods. Dimensions of this are 62.4" W x 27" D x 25.79" H before being crated.

Some notes for this unit:

There is a panel dent in the back, above the power inlet and audio outputs.

There is a panel dent to the left side of the CV Matrix.

There is a small blemish on the right wooden end cheek.

There is a small dent on the left wooden end cheek.

There is a small blemish on the back left top wooden lid.

VCOs are calibrated for the Touch Sequencer and will need recalibration for external 1V/Oct use."

CLICK FOR MORE »

Orpho CV Note Looper – Calibration Mode Explained

video upload by HOX808

"This video shows how to calibrate the Orpho CV Note Looper for accurate pitch tracking across multiple octaves.

Learn how to enter Calibration Mode, adjust tuning and octave tracking, and match the module to an analog oscillator using the 1V/Oct standard. For this demonstration, a Behringer 921 VCO is used, along with a tuner for precise adjustment.

Calibration helps compensate for small variations in modular systems and ensures that all notes stay in tune over the full range.

For more information and to download the full manual, visit:
👉 www.orpho.de"

Orpho CV Note Looper – Quantizing 32-Step CV Recorder and Sequencer for Eurorack

video upload by HOX808

"CV Note Looper is a quantizing 32-step 1V/Oct CV recorder for Eurorack, built for flexible melodic sequencing and hands-on control. Create anything from short looping phrases to full 32-step patterns, shape them with selectable scales and root notes, and keep everything locked into a musical flow. This video shows the module in action, including pattern recording, playback, scale setup, and calibration."

https://www.orpho.de/

BugBrand Frequency Shifter

via BugBrand

"The Frequency Shifter (red) is a powerful and experimental analogue processor. This standalone design springs from my Quadrature Sine and its Frequency Shifter Expander modular designs – all wrapped up with circuitry & features to allow it to fit snugly into more regular studio processing roles.It will transform your audio streams in otherworldly ways – clangorous, tonal, phased, stereofication and swoosh.

CLICK FOR MORE »

Yuyo cmos synth - First try Attiny85 dco with analog cmos shaping and twin t filter

video upload by JIANT

"everything is from the synth to the zoom recorder, twin t drums, xor snare, pt2399, and cmos stuff.

attiny85 reseting the phase of 40106 oscilators, the digital control accepts 1voct from keysetp and go to the 40106 inputs through resistors, a little rc for filtering the pwm, and for this reason when you change the oscillator frequency you can get intervals and crazy stuff. is not orthodox but suits my need for Rich timbres. the dco goes to 40106 buffers , and then 4040 dividers, twin t filters, one for each of the two voices, one goes to env, vca, filter, delay, and the other one to clock divider and filter, to get the sub osc.

firmware super simple only for checking the conversion from filtered frecuency of the attiny85 to my 40106 non exponencial vcos.
currently is tracking 10 octaves really good, the trick is put a voltage divider in the cv in of the attiny because keystep has 0 to 10v and the attiny accepts 0 to 5v tehn the tracking inside the attiny converts o.5v oct to 1 volt oct. i dont know anything about coding but i made it with chat gpt and my design . source code will be in the coments ."

Previous videos:

CLICK FOR MORE »

Scale Snap - Eurorack Random Note CV Sequencer

video upload by HOX808

"Scale Snap generates random but scale-accurate note patterns of up to 16 steps. You choose the key/scale, root note, number of steps, and how “jumpy” the pattern feels. It also includes a chord/'Strainer' mode that locks notes to triad tones (random-only, ascending, or descending).

Connections include clock in, 1V/Oct CV out (0–5V), reset to step 1, and a random trigger/button. Controls let you set root, select from multiple scales (chromatic, major, minor modes, pentatonics, etc.), and adjust a parameter that switches between probability of change, octave range, and step count. The display shows step progress, current parameter values, root/scale name, and a scale grid with the active note highlighted."

Huge Modern Modular Filter Tones & Techniques // 3 Patches for Ceremony & Sigil from Nekyia Circuits

video upload by DivKid

"Here we have a 3 Patches series video with the character oozing CEREMONY, a low pass morphing to twin peak band pass filter packed with modern features and lots of CV options and SIGIL a compact function generator for envelopes, LFOs, slews or other function generator tricks! Check out the patches and skip around below."

"If you'd like to support work like this and the wider range of what I do, considering heading over to Patreon at https://bit.ly/DK-patreon and supporting for as little as $1 a month to gain access to the DivKid Discord community, plus lots of exclusives such as PDF patchbooks, videos and more. https://bit.ly/DK-patreon"

*TIMING INDEX // CHAPTERS*

NOTE // sub bullet points are points of interest within each section/patch, for those that might be looking for a specific detail to skip back to.

INTRO

00:00 Hello & previews

01:16 Sigil feature run down (function generator)

CLICK FOR MORE »

SWITCHTRIX ELECTRONICS KS SEQUENCER WITH INTERFACE/ARP ODYSSEY

video upload by SWITCHTRIX ELECTRONICS

"Our recreation of the classic KS sequencer using the output interface to connect to an ARP ODYSSEY.

This allows the KS to connect to 1V/oct synths or MK1 EMS Synthi/VCS3

For more info contact

mail@switchtrix.co.uk"

Red version in previous posts here.

The Fancyyyyy K-Accumulator - A Complex Oscillator Made of Complex Oscillators 👽

K-ACCUMULATOR - 21st Century Complex Oscillator video upload by Fancyyyyy Synthesis

Note, this appears to be the first Fancyyyyy post on the site. :)

Currently exclusive to Perfect Circuit

"The Fancyyyyy K-Accumulator is a revolutionary stereo complex oscillator that combines cutting-edge synthesis techniques in an intuitive, hands-on architecture inspired by classic complex oscillators. Designed in collaboration with Grrrwaaa aka Graham Wakefield, creator of Max/MSP's gen~ platform, fans of experimental timbres and novel synthesis techniques are right to celebrate K-Accumulator's emergence into the Eurorack landscape. Seamlessly combining pulsar synthesis, phase modulation, and complex 3D waveshaping, K-Accumulator pairs its modulation and carrier oscillator pairs with an onboard function generator, pattern generator, and flexible root frequency quantization and manipulation, providing fruitful terrain for exploring captivating timbres in systems of any size.

Starting from a core sine and cosine wave, K-Accumulator provides an innovative morphing matrix architecture which progressively remaps panel controls to waveshaping positions for the carrier and modulator oscillator section. Expand tones with complex harmonic wavefolding, blended frequency shifting, and harmonic stretching. Shape tones into newly mangled forms with formant synthesis, sync damping, and asymmetric phase modulation, or invite chaotic movement and surprise with damped cross phase modulation and damped self-feedback. Even the onboard function generator can sing, enabling audio rates for pulsar synthesis that can be operated independently from the main oscillator. Despite the PhD in DSP you might need to fully understand K-Accumulator's synthesis engine, the morphing matrix architecture allows these many manipulations to be smoothly and seamlessly explored through intuitive manual control.

Even further possibilities abound when employing K-Accumulators twenty-three patchable points of external signal integration, with most primary CV inputs featuring dedicated attenuverters for precision control. In addition to CV control over the frequency, shift, depth, morph, and shape controls, the primary oscillator in K-Accumulator offers CV inputs for thru-zero phase modulation, damped/pulsar control, and an external input which can be used as an external sync source or for pitch-tracking an external source to use K-Accumulator to harmonize with external sources. Its outputs offer both the sine and cosine waves, creating unique stereo space through the phase differences on each output as it is manipulated by the waveshaping engine. Control root frequency for the oscillator section, function generator, or both, with both 12-TET and Just Intonated quantization, multiple scales of frequency control, and a dedicated detune control in the modulation oscillator for inharmonic applications.

At the left side of K-Accumulator, a highly flexible function generator is onboard for additional modulation or audio sources. Multiple unique internal trigger modes, looping capability for LFO and audio rate oscillation, thru-zero FM, and onboard waveshaping make this a potent source of signal manipulation for either K-Accumulator itself or anywhere in your system. To the right of the function generator, a Delta-Sigma pattern generator enables stepped and smooth pseudo-random pattern modulation, providing an onboard sequencer for root frequency, or any other parameter. With its immensely capable and unique synthesis engine alongside flexible and creative onboard modulation sources, Fancyyyy's K-Accumulator offers a new vision of complex oscillation for contemporary modular synthesis, translating vanguard digital signal processing into a familiar form factor for deep sonic exploration, intuitive skronking, and new musical forms yet unheard."

Available at Perfect Circuit

CLICK FOR MORE »

Doepfer A-188-9 High Speed VCO - Audio Demo

video upload by Doepfer Musikelektronik GmbH

"Over the last month, we have been recording videos for our Instagram channel. Here is a compilation of some of the clips!

In the video, the A-121-S stereo filter is mainly used as an end-of-chain filter. In combination with the A-149-4 quad random voltage source, it is possible to add modulation to the stereo field.

The feedback path was often patched in the clips, for example with a bandpass filter that had high resonance. This can lead to some pretty crazy sounds, as you can hear!

Another interesting thing to try is playing really high or low notes. Some of these the BBD is unable to track, which results in some quite nice glitches.

The A-188-9 and A-188-1 BBD combo offers a wide range of sound possibilities and often produces happy accidents. It's totally worth trying!

Questions? Let us know!

Module A-188-9 is a so-called high speed VCO that tracks prefectly to the 1V/oct scale in the frequency range of about 15kHz ... 500 kHz. The main application is the exact drive of BBD modules (A-188-1/2) to generate sounds realized by means of the so-called Karplus-Strong synthesis. But even in cooperation with other modules featuring high speed inputs (e.g. digital noise, delay, frequency divider) the A-188-9 makes sense. In principle, the module is made of a precision audio VCO followed by a PLL (phase locked loop) unit that multiplies the frequency of the audio VCO by 32. Thus the module can be used also as an audio VCO as it features the standard waveforms sawtooth, triangle and rectangle with adjustable pulse width."

See the announcement post here.

First Stage Fright

video upload by davidryle

"Rossum Electro-Music works its' way into the 5U system. The results are pretty nice.

Using a Trident Oscillator with quantized pitch CV from a Mob Of Emus into three envelopes from Synthetic Sound Labs Octal VCA Expander, then on to the Rossum Panharmonium Mutating Spectral Resynthesizer.
A tap off the Trident is sent to the Rossum Linnaeus filter for a percussive FM part which starts the work. The timing is from the Moon Modular 563 Trigger Sequencer.
The rhythm section is the Synthetic Sound Labs / Hagiwo Geo Gruvn euclidean sequencer for all the parts.
The bass part is the SSL Woven Spirits (MI Plaits) in wavetable mode.
The dual Q960 sequencers are transposing the 1V/Oct input to the Panharmonium and sending various control voltages to the bass and another pad swell sounds from the 5U system.
All recordings are in real time to Cubase 12 and video is edited in Final Cut Pro."

Bastl CITADEL - FX WIZARD Multi-effect processor & WAVE BARD Stereo Sample Player

video upload by Bastl Instruments

User videos:



Playlist:

1. Bastl Citadel Breakbeat Party - Stazma and Bastl Instruments
2. BASTL CITADEL! FX Wizard and Wave Bard Sampler comes to Eurorack! - The Unperson and Bastl Instruments
3. Bastl Citadel: A TWO-FACED friend with Samples + FX - Turbo Tambourine and Bastl Instruments

Check with dealers on the right for availability and price.

"Bastl CITADEL - Fortress of Modular Magic - is a Eurorack reimagination of the popular Kastle 2 semi-modular desktop device. The CITADEL comes with a full 3.5mm patch bay that offers the flexibility needed in the Eurorack format while maintaining the strengths of the Kastle 2 allowing it to stand on its own, and yet let it truly shine when patched with other modules. We’ve also added switches
for hands-on control of the pattern generator. The Citadel provides the basic infrastructure needed to integrate Eurorack systems within the context of electronic music making: headphone output, TRS MIDI input and sync, tempo generator with divider/multiplier, USB MIDI (from the back of the module), stereo mixing, integrated LFO and Pattern generator and effects. All that makes it the perfect module for smaller and beginner systems while the fun and unique creativity of the Kastle 2 firmwares:
the FX WIZARD multi-effect processor and WAVE BARD sample player will earn its place in
larger setups.

🛠️ Get Wave Bard & FX Wizard at the same time 🔃
The Citadel comes equipped with a reversible front panel with WAVE BARD on one side
and FX WIZARD on the other side. It also comes with our custom designed tool to make
the panel switching as seamless as possible. You can load and try different Citadel/Kastle 2
present and future firmwares and updates with a USB port (on the back).

The Citadel might break a few rules of standard Eurorack design, but it does so in the name
of instant musicality, fun, and effortless integration of Eurorack with other gear. The PITCH
inputs on the WAVE BARD track 1V/Oct, are factory-calibrated, and there’s even dedicated
calibration software to ensure a perfect match with your source."

CLICK FOR MORE »

Erica Synths - Fusion System 1

Note: links to listings are affiliate links for which the site may be compensated.
video upload by NOISEBUG

https://www.noisebug.net/

Update: moved this one up for the added video.

"Erica Synths - Fusion System in excellent condition

She’s a real screamer! Available for purchase on our used reverb page. Interested in trading in your gear for store credit? Shoot us an email! #synth #eurorack #modularsynth"




via this Reverb listing

Additional NOISEBUG Listings

"Fusion System MK1 in excellent condition. This system has been fully tested. all modules function as expected and the modules all sound incredible!

Comes in an Erica Synths powered skiff with original PSU.

Erica Synths Fusion Drone System is here for those, who want to explore the dark territories of the sound, where only few have stepped in.

Vacuum tube based Erica Synths Fusion Series modules are the basis for this system, while Black Modulator and Black Envelope Generator add plenty of modulation and noise generation possibilities. It has 43 patchpoints for extensive experiments in sound design, all analogue signal and CV path to create the drones of massive power. Want a solid bassline with great 1V/oct tracking? Use CV/Gate sequencer or keyboard and you have it! Erica Synths Fusion Drone System brings distinct and powerful sound into eurorack.

Fusion Drone System includes:

Fusion VCO – Two double triodes in bistable latch connection act as suboscillators: -1 and -2 octaves with plenty of mixing opportunities for amazing sonic results. External audio signal can replace internal VCO.

Fusion Ringmodulator V2 – Germanium diodes enrich the sound by adding extra harmonic content meanwhile vacuum tube adds evilish overdrive to audio and carrier signals.

Fusion VCF V2 – Each side of the double triode drives signal between 2nd and 3rd stage of the filter, while germanium diodes are used to limit the output signal.

Black Modulator – a fully analogue modulation and noise source.
Black 8-Multi – an advanced replacement for stackable patch-cables – it is active buffered multiple with signal status LEDs.

Fusion VCA V2 – a Russian miniature pentode 1Ж24B with power consumption comparable to an LED.
Black EG – the ultimate control over envelopes in your modular system.

Fusion Delay/Flanger/Vintage Ensemble – a distinct multifunctional analogue effects module that combines BBD chip based effects with an adjustable tube overdrive in the delay output and a feedback path for extra thickness of the sound.

104HP One Row Skiff case"

CLICK FOR MORE »

Multimode Tube Filter, Saturator & Beyond! // VAMP from Apollo View Modular

video upload by DivKid

"With Vamp Apollo View modular took the early Korg MS-20 and MS-10 filter designs, which favoured non-linear character over stability and control, they added more character with a tube input saturation stage and tube resonance feedback path, further output clipping stage options and then designed in modern stability and control. I joke in the video the filter is so rubbery it might as well be wearing a gimp mask. Vamp is also multimode with low pass, band pass and high pass modes with routable pre/post VCA and gain option, smart normalled CV options and prevision circuitry to turn it into a full single module tube voice, killer kick drum and more.

Vamp, manual, signal flow & more at // https://www.apolloviewmodular.com/mod..."

VAMP
8HP Multi-Mode LP/BP/HP Sallen-Key Filter with Tube Saturation & Distortion

VAMP is a multi-mode analogue filter that gives you low-pass, band-pass, and high-pass responses in a compact 8HP design. At its heart lies a classic Sallen-Key topology supercharged with real vacuum tube (12AU7) saturation and multiple stages of clipping, letting you move seamlessly from smooth, hi-fi filtering to snarling, overdriven character.

One half of the tube is used to saturate the input, while the other half provide MS-20-inspired resonance limiting (tube, not diodes). With FLOW placing the VCA pre-tube or post-filter, and FANGS selecting Off / Soft / Hard output clipping, VAMP ranges from subtle warmth to ferocious harmonic destruction.
FEATURES
Three filter modes: low-pass, band-pass, and high-pass
Classic Sallen-Key topology with tube saturation and clipping
12AU7 vacuum tube: one half for input drive, one half for resonance distortion
MS-20-style resonance limiting/clipping for aggressive tones
FLOW switch: Integrated VCA pre-tube or post-filter
FANGS: output clipping: off / soft clipping / hard clipping
1V/Oct cutoff tracking: use VAMP as a VCO in self-oscillation
Extensive CV control: GAIN, FREAK (cutoff), REZ (resonance) (all with attenuverters)
Self-oscillation for screaming tones
TECH SPECS
8HP
30mm Depth
40mm Max Tube Height from panel
Reverse polarity protected
+12V 230mA
-12V 70mA