LFO
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Rampage is Befaco’s approach to an old invention: the Serge/Buchla ramp generator.We took the idea of a “patch programmable” function generator/processor, put two units in the same module and expanded them with new functions and ways to combine them: Slope detectors, analogue logic functions and evolved outputs.RAMPAGE APPLICATIONS• Voltage controlled Attack Decay envelope.• Attack Sustain Release Envelope .• More complex ADSR Style Envelope.• Dual VCO. With Square, PWM, Saw, Log, Exp and Triangle shapes. Hard and soft sync.• Gated VCO• VCO + Analog AND Gate (As ADTimbral VCA)• Dual Low Pass Filter• Dual Low pass Filter with VCO soft sync.• Low Pass Filter + AD Envelope• Dual “syncable” voltage controlled LFO with Square, PWM, Saw and Triangle shapes)• Complex LFO . Function combination.• CV controlled and “Ping-Pong” LFO.• Dual Slope detector. Distinguishes when and incoming signal (CV or audio) is rising or falling, and generates gates in concordance.• Comparator. Send a gate when B IN is bigger than A IN• Polyrythmic gate generator. With both channels synced between each other, it generates several “complex rhythm” gates.• Voltage controlled Slew limiter with independent attack and decay control and continuous variable shape between Log, linear and exponential• Peak Voltage follower. Max Out follow the maximum Level of the two inputs.• Minimum Voltage Follower. Min Out follow the minimum level of the two inputs• Envelope follower with adjustable response for rising ans falling flanks.• Voltage controlled Trigger Delay .• Burst Generator.Features:• Built around two voltage controlled Integrators aka Lag Processors.• Convert square signals into ramp waveforms• Achieve “Portamento” or “Glide” effect when applied to pitch CV signals.• Basic lowpass filteringDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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RANDOM8 is an eight-channel random CV generator and looping voltage sequencer designed for improvisation, generative patching and live performance. Developed in collaboration with Mylar Melodies, it delivers random, repeating and slowly evolving control voltages in a compact 8HP Eurorack module.Each channel generates independent stepped or smoothed voltages from 0–10V. Incoming triggers are normalled between channels, allowing a single trigger source to control all eight outputs or additional triggers to create independent groups. Dedicated attenuators set the output range of each channel, while loop lengths from 1 to 32 steps make it easy to capture and repeat modulation phrases.A single button press switches a channel between looping and evolving operation. Pressing it again locks the current phrase, while a double press returns the channel to fully random generation. Per-channel probability, trigger division, offset and slide provide detailed control over the timing and movement of each voltage. Eight random generation modes include different voltage distributions, alternating high and low values, and wandering modulation that behaves like an invisible hand moving a control.The built-in pitch quantizer transforms any channel into a melodic sequencer, with 14 musical scales, an unquantized mode and a dedicated octave scale. RANDOM8 can generate eight melodies simultaneously or combine pitch sequencing with modulation, animation and LFO-style movement across an entire Eurorack system.Eight presets store the complete module configuration for quick recall, and the one-layer menu system keeps advanced functions accessible without a display.Features• Eight independent random, looping and evolving CV channels.• Adjustable loop lengths from 1 to 32 steps.• Per-channel pitch quantizer with 16 scale options.• Eight selectable random voltage generation modes.• Slide for smooth modulation, LFO shapes and acid-style sequences.• Per-channel probability, trigger divider and voltage offset.• Cascading normalled trigger inputs for grouped modulation.• Individual output attenuators and 0–10V unipolar outputs.• Eight presets for saving and recalling complete configurations.• USB-C firmware updates and free VCV Rack version.• Compact 8HP design with a depth of 30mm.• Power consumption: +12V 60mA, −12V 12mA.
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Cosmos is a new kind of module that will help you to creating complex modulation, sounds, patterns with ease and will lead you to new sounds territories.Inspired by early analog computers, Cosmos is a unique, innovative, very flexible and fully analog module allowing it to be used as: VCO, LFO, Ring Mod, Polarizer, “VCA”, “LPG”, Phase Lock Loop, Cross-Modulation, Minimum, Maximum, Logic Gates, Waveshaper, Complex gate generator, Fuzz, Distorsion, Gate extractor, Trig extractor, Gate generator, Voltage generator, Trig Generator, comparator, window comparator, complex comparator, Half-Rectifier, Full-Rectifier, Inverter, Buffered Multiples, Mixer, Difference, Compressor, Sidechain, compressor, VC Clipper, VC Switch, Clock doubler, Envelope follower, and more.With its wide fields of application Cosmos can replace many modules but it will also bring new colors to your palette thanks to its unique character. This makes Cosmos the ideal module whether you have a small case or a big system. 100% analog and with an intuitive interface Cosmos is also very easy to use, no menu and button combo problems.Inspired by the past and crafted for the future, 100% analog Cosmos was not only thought to be the center of any system but also to blend perfectly with the rest of your case to form a consistent and coherent system.Cosmos was designed not only to be a swiss army knife module but also to push you to explore and you help create new sounds and explore sonic territories that were previously unattainable.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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As its name implies, EG LFO is composed of an Envelope Generator and an LFO.The envelope generator offers control over Rise, Hold and Fall time. Two ranges of envelopes are available: slow and fast. You can also modify the speed off the fast mode using the speed expander on the back of the module.At the output you will find the envelope output and an inverted copy of the envelope.EG LFO II also features a LFO mode, the speed can be controlled by using the rise and fall control. Two speed modes are available, LFO range in slow mode and audio range in fast mode. You can modify the speed off the fast mode using the speed expander on the back of the module.At the output you will find the LFO output and an inverted copy of the LFO.DIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.
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As its name implies you could think that SLEW/LFO is just a Slew and a LFO packed together but its more than that.We wanted to design a module around the Slew generator which is an underestimate function of a synth. Its often seen and use as a way to make portamento but we've thought it could be more than that.We wanted to design a small module so it could fit in any case. We wanted it to be ergonomic and easy to use despite its size. But we also wanted to pack as much features as possible to make it a "swiss knife module".The result is SLEW/LFO: a 4 HP wide module, that can be used as portamento, AD envelope, LFO, VCO, Filter, Envelope generator and much more.SLEW/LFO is so versatile that we use it in all our patchs, we are very pleased about it and hope you'll like it as much as we are.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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Ilse is an elegantly minimal, yet fully functional synthesizer voice in a compact 10 HP Eurorack module. The only thing you need to let it meow is a CV source to trigger its 1V/Oct frequency input (or a MIDI to CV converter and a MIDI sequencer) . Because it has a low part count it is ideal for Eurorack beginners or entry-level DIY projects.Ilse is named after a cat, living in the legendary “Villa” in Weimar, Germany. The “Villa” was a place where a community lived and came together. Many underground concerts and parties took place here before the house got sold, renovated, and the mayor moved in. We created the graphics on the aluminum face-plate in her memory. Ilse (the synth) makes great acid sounds, so it was only logical to illustrate a cat tripping. Turn the knobs to make her look around or roll her eyes.Ilse is designed to be affordable, easy to build, yet flexible, and feature rich. It is a synthesizer voice for your Eurorack, but can even be driven without a rack using two 9V batteries (not included).Ilse is fully open source (KiCad schematic and layout is available in a git repository) and inspired by Syntherjack’s single-chip synthesizer Totoro. Check out his website with nice explanations, e.g. on the filter (we use the same filter on Ilse). We extended the design for external voltage control on filter, oscillators and LFO. Unlike Totoro, Ilse is designed around a unique oscillator design, which integrates the exponential conversion directly into the oscillator core. This results in an efficient circuitry saving you build time, parts and costs.PCB and face-plate are manufactured in the EU.Features:Functions• Two saw tooth oscillators• Bridged-T low pass filter with resonance control• Triangle LFO with speed control, and routing to filter and/or oscillators• Simple mixer and detune for oscillatorsControls• LFO Speed, Filter Modulation, Osc Modulation• Filter Cutoff, Filter Resonance• Tuning, Osc2 Detune• Osc1/Osc2 (Filter in)• Output volumeInput/Output• 1V/Oct CV for oscillators (0-5V)• Gate (0-5V)• Filter cutoff (0-5V)• External filter input• Volume controlled output• LFO Speed (linear, via solder pad on back, 0-8V)• Oscillator 2 detune (linear, via via solder pad on back, 0-8V)DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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The Arkarion is a full-featured analog synthesizer voice in Eurorack format, designed for creative exploration and dynamic signal flow. Combining the warmth of analog circuitry with a digitally controlled internal routing system, Arkarion offers a unique blend of structure and unpredictability. It's an expressive, performance-ready instrument for musicians seeking deep modulation, generative possibilities, and hands-on control.At the core of Arkarion lies a digitally interpreted “DNA patch system” — a signal-routing framework inspired by genetic code. This system unlocks over 65,000 modulation and audio paths, allowing for rich, morphing textures that evolve at the press of a button or incoming gate.Features:• Complete analog synthesizer voice with digital routing control• 2 analog VCOs with selectable waveforms• MIDI input with pitch CV and gate outputs• Envelope generator with rise/fall stages, loop and gated loop modes• 2 CV-controllable LFOs for versatile modulation• Gate-triggered random voltage source• Multimode filter: lowpass, bandpass, highpass, allpass (switchable)• Tape-style analog delay with CV control• Digitally controlled “Gene Modification” knob for live routing mutation• 16-bit routing architecture: 65,536 possible patch configurations• 64 patch memory slots (8 banks of 8 presets)• Internal VCAs for modulation depth control• Randomize routing via button or external gate input• LED indicators visualize current patch structure and modulation pathsDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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The 4VCLFO is four LFOs with triangle outputs in 10 HP. It features a knob for the frequency of each LFO and CV inputs with attenuators. The „Aux“ input is normalized to the four CV inputs, so you can modulate all LFOs with one signal at the same time. Plugging a cable into the CV input breaks its connection from the aux input. This way you can create more interesting Modulations for your Patches.Features:• 4 independent Triangle wave LFOs• CV input with attenuator for each LFO• „Aux“ input normalized to the CV inputs• Eye-catching display for indication of polarityDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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The CubuSynth VCLFO v2 is a Digital Voltage controlled Low frequency oscillator, with 16 Waveforms, Step control (Sample & Hold style), LFO Sync / Reset, CV control over Frequency, Amplitude, Waveform, Frequency multiplier, Skew and Step Rate.It is based on the Electric Druid VCLFO10 chip which was written/designed by Tom Wiltshire aka "Electric Druid".Features:• 16 Waveforms selectable in two Banks of 8• Frequency range: 0.05Hz to 12.8Hz (102.4Hz with multiplier x8)• 6 CV inputs for Multiplier, Frequency, Step Rate, Skew, Waveform and Level• "Sync" Input for LFO reset, or Step Sync• 3 outputs: Uni-Polar (0 to +5V), Bi-Polar inverted (+5V to -5V / 10Vpp) and Bi-Polar normal (-5V to +5V / 10Vpp)DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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The Cali oscillator is a new and improved version of the classic Buchla 258 wave shaping oscillator with an additional pulse width modulated output.The oscillator features the classic Sine to Square and Sine to Saw wave shaping with dedicated CV control.The Cali Oscillator differs from previous versions of the 258 in that it has a 3-way position switch rather than 2-way.This new middle position features a bonus waveform that will shape from a pulse into a kind of triangular trapezoid shape.The shaping control is more unpredictable in this middle position and the switch reacts to body contact when the wave shape is set low – it can bethought of as an extra bonus waveform, great for producing glitchy sounds! There are dedicated inputs for linear and logarithmic FM and the Cali alsoadds a Pulse output with it’s own width control and PWM CV input.The behaviour of the pulse output can be affected by the position of the waveform switch and wave shape control.The module features Coarse and Fine frequency controls and an LFO mode, LFO range is accessed via an LED pushbutton that alsoacts as the LFO speed indicator – the button will light up when the waveform moves through its positive cycle.Because the wave shape modulation is independent of pitch this oscillator is very useful for creating complex timbres whilst retaining musical pitch.Features:• Sine to Saw/Square Waveform Output with CV over wave shaping• Pulse output with voltage controlled PWM• Linear FM with attenuator• Logarithmic FM with attenuator• Bonus ‘trapezoid’ output• Coarse & Fine controls with LFO mode• Includes power supply isolation on frequency controlsDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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The EN129 Thru Zero Oscillator is an all analogue triangle-core VCO specialising in frequency modulation.Analogue through-zero FM modulation produces a wide array of timbres particularly useful for bell like or percussive sounds.Through zero linear frequency modulation can be precisely dialled in thanks to a dedicated CV input attenuator and through zero offset control.Logarithmic FM is also available via it’s own dedicated input with attenuator and both FM inputs have an LED to indicate incoming voltages.Simultaneous analogue wave outputs include: Sine, Triangle, Sawtooth, Square and Pulse wave with Pulse Width Modulation.The PWM control goes to zero at either end of it’s range, which is very useful for creating rhythmic sounds with voltage control.Furthermore the PWM control doubles up as wave shape modulation for the Sawtooth wave – gradually altering the waveform until it shifts half a cycle.The EN129 features Coarse and Fine frequency controls as well as an LFO mode. LFO range is accessed via an LED pushbutton that alsoacts as the LFO speed indicator – the button will light up when the waveform moves through its positive cycle.A new addition of a Soft Sync Input allows the phase of the oscillator to be controlled by an external oscillator for an even greater range of timbres.Features:• Soft Sync Input• Thru Zero linear FM• Logarithmic FM• Zero to zero pulse width modulation• Sawtooth wave shape modulation• Simultaneous outputs for: Sine, Triangle, Saw, Pulse & Square• Coarse & Fine controls with LFO mode• Includes power supply isolation on frequency controlsDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Most drum sequencers are complex machines crowded with buttons and LEDs. The mki x es.edu DIY Drum Sequencer kit takes a different path: a hands-on rhythm engine with a minimalist interface built from just a handful of logic chips. The four independent channels are programmed in real time using a single button, so patterns loop automatically, can be shortened on the fly and support half-time playback for slower, evolving grooves.Accents and dynamics are handled by synced LFOs, and a simple resistor DAC converts patterns into stepped control voltages – perfect for modulating pitch, decay, filter cutoff, or other parameters. This logic-chip sequencer delivers tactile, musical performance without relying on microcontrollers, making it an excellent DIY drum sequencer kit for learning sequencer design and sharpening soldering skills.Features:• 4 independent channels with one-button step input/removal• 16 steps per channel, individually reducible to 12 or 7• Optional half-time mode per channel• Two syncable analog LFOs for dynamic accents• Resistor-DAC output for pitch or decay modulation• Internal clock with 16th, 8th, and quarter note outputs, syncable to external gearDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Lazer Phazer it's at his core 2xSystem7xx phaser with a lot of addons.It can work as a stereo phaser, as a mono BI-Phaser, as two totally independent phasers, or as a 16stages phaser in series mode. Thath's not all, the LFOs of the phasers can work idendepently or linked. In inverted mode for stereo phase galore. The feedback can be modulated by internal LFOs, external CVs or both of them in the same time.Kits have 16 x 2SK30A fet transistors matched and selected from new old stock, so the retro sound it's totally there.This module is a collaboration between Feedback Modules and CMS-LAB.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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This little module is an evolution of the LFO of the famous MS monophonic synth from the seventies, adapted to Eurorack.Features:• 2 control pots for FREQUENCY and WAVEFORM• 1 FREQUENCY RANGE switch: LOW and HIGHLOW - 18mHz (55sec)- 0,7Hz (81,4sec)HIGH - 0,63Hz (1,6sec) - 24Hz (42msec)• 2 outputs: SQUARE 0/10V Vpp and TRIANGLE -5/5V Vpp• Standard 10 pin euro power (+12V / -12V)DIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.
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Complex analogue LFO from a vintage Japanese modular system!We injected some steroids in this LFO and the results are lots of features.Not only can you use 8 individual waveform outputs, but you can also use thealternative two linked outputs for which you can select any of the waveforms.This alternative output has a VCA so you can fade in the LFO signal in adefined duration with a potentiometer.The stair-like waveforms can be changed from 16steps, 8steps, 4steps or mangled.All of these are seasoned with cv control and waveform reset.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Complex analogue LFO in just 4HP!Waveshaped Square and Triangle output plus extra inverted Triangle output.Reset and gate function, multiple LFOs can be chained for complex gates and CVs.Very long LFO time on minimum setting, more than 1 min.Features:• 2X control pots for FREQUENCY and WAVEFORM• 1X FREQUENCY RANGE switch: LOW and HIGHLOW - 4,7mHz (210sec/3.5min) - 0,625Hz (1.4sec)HIGH - 183mHz (6sec) - 25Hz (40msec)• 1X MODE switch : STOP and RESET• 1X input jack : RESET• 2X outputs : SQUARE 0/10V Vpp and TRIANGLE -5V/5V VppDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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A 4 HP combined looping AR generator and triggerable LFO. Blades Of Ingenuity is a simple but surprisingly useful module consisting of two elements.Features:Attack/Release generator• one shot and looping modes• looping mode range 19 Hz to 5 secondsLow Frequency Oscillator• sawtooth/triangle/ramp switch• externally retriggerable• range from 19 Hz to 60 secondsDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Full featured, fully modular synthesiser for Eurorack with a pre-patched normalised signal path for quick setup.A combination of the XVCO TWO, Raging Bull 3.0 VCF/VCA, and System X Envelope, where each section can be used completely individually or as part of the larger whole.Onboard LFO for PWM and FM and Noise Source.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Shapes is a wide ranging and fully analogue oscillator which can perform duties as both auxilliary VCO* as well as VC-LFO. Shapes can be configured to cycle continuously, or to provide one-shot shaped outputs. When set to one-shot mode, Shapes may be used as an ersatz envelope generator.Using the Time knob, Shapes can cycle from as low as 8 seconds (whale song) to as high as 19500Hz (bat beeps).Shapes has 3 simultaneous outputs:sawtooth (+/-5V, 10Vpp)ramp (+/-5V, 10Vpp)triangle (+/-5V, 10Vpp)Additional waveforms may be derived courtesy of the Shape knob. Anticlockwise from 0 achieves progressively logarithmic sawtooths and ramps, whereas clockwise from 0 achieves progressively exponential sawtooths and ramps. The effect of the Shape knob on the triangle waveform is asymmetric, anticlockwise from 0 achieves progressively logarithmic leading edge, whereas clockwise from 0 achieves progressively exponential falling edge. Progressively exponential triangle waveforms can be achieved using the Time CV knob (set Shape knob to 0) providing there is no jack in the Time CV input socketTime CV input provides wide ranging control of time. It is possible to dial in something approaching 1V/oct over a limited range, although Shapes has not been designed to perform as an accurately tracking VCO. In the audio range, Shapes comes into it’s own when used as a ‘daughter’ VCO to an external ‘mother’ VCO by patching the ‘mother’ VCO into Shapes’ Gate In input socket – some impressive oscillator sync style effects can be achieved.Gate In can also be used to initiate waveforms in one-shot mode, where a pulse of any length will cause Shapes to complete one cycle.*Shapes has not been designed to perform as an accurately tracking audio VCO.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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Ultra Wave is a fully expanded version of the Wave Runner LFO. It’s a multi-waveform sync-able LFO based on the Electric Druid TAPLFO2D family of code, but with some significant additions and improvements. The WAVERUNNER 1 PIC and code is exclusive to Frequency Central and was developed specifically for the Wave Runner/Ultra Wave, and is not compatible with similar modules.Ultra Wave has both manual and CV control of frequency, clock multiple, waveform and wave distortion. Additionally there’s sync input and output level CV input. Two outputs, LFO and clock.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.