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Filter & EQ karl / multi-mode stereo filter / 8 HP ⇣ Karl is an analog multi-mode filter that is loosely based on the KORG MS-10 and MS-20 filters, but has been improved to handle two mono or one stereo audio source. The Resonance can still be varied independently per channel, which is very interesting when using two different audio sources at once. If you want to merge the two audio sources there is a Mix Out next to the two independent outputs per channel. 1/3 key features Analog Dual/Stereo-Filter 4 Filter Modes: LP, HP, Phaser and Overdrive Independent Resonance Control Mix two Mono Signals Mono to Stereo Converter CV Control over Cutoff Frequency CV Attenuator Expander Module Wrong Polarity Protection specs & downloads width: 8 HP depth: 28 mm power: 56 mA @ +12V / 45 mA @ -12V documentation videos description / manual Karl has four modes: Low Pass Mode: Classic Analog Low Pass Filter High Pass Mode: Classic Analog High Pass Filter Phaser Mode: A small band of frequencies is filtered next to the original signal being passed through Overdrive Mode: If Resonance is increased the filter will quickly jump to overdrive, which creates some nice Harmonics The Modes may be changed via jumpers on the back of the module. In any mode the Cutoff Frequency may be changed via CV. The CV signal can be attenuated with the CV potentiometer. There is also an expander module available. The „Karl Mode Selector“ gives you front panel control over the modes and an alternative audio input for the right channel that can be activated via switch. prev Up next

Oscillator honeyeater v3 / cem3340 analog vco with sub-oscillator / 6 HP ⇣ HONEYEATER is a classic analog VCO featuring two sub-oscillators and mixable waveforms. Built around the renowned CEM3340 "Curtis Oscillator" precision VCO chip — found in legendary synths like the Sequential Prophet-5 and Oberheim OB-8 — this module delivers rich and raw analog sounds in a compact, low-HP format. It is one of our most popular modules! 1/4 key features CEM3340 Analog Oscillator 5 Mixable Waveforms White Noise Two Blendable Sub-Oscillators Linear & Exponential FM VC Pulse Width Modulation Skiff friendly Wrong polarity protection specs & downloads width: 6 HP depth: 30 mm power: 56 mA @ +12V / 45 mA @ -12V documentation videos description / manual Honeyeater is the ideal choice for big sounds in compact cases! It serves as a versatile workhorse oscillator, capable of producing both classic and complex waveforms beyond typical analog oscillators. Use the COARSE and FINE knobs to adjust pitch, with FINE allowing smaller, more precise pitch changes. Increase the volume of the Pulse, Triangle, or Sawtooth waves, as well as the Suboscillators, by raising the three faders. Note that waveforms may slightly overdrive in the top third of each fader’s range. You can also switch between a triangle or sawtooth waveform for the middle fader. The SUB MIX knob controls the two sub-octaves: turning it right increases the volume of the sub-oscillator one octave below the root pitch, while turning it left boosts the one two octaves below. At the center, both sub-octaves play equally; at either end, the opposite sub is fully muted. Ensure the SUB fader (3) is raised to blend sub-octaves into the main mix. To add white noise for a grittier sound, turn the NOISE knob to the right. The Pulse Width of the Pulse waveform can be adjusted manually or via CV using the knob above the PWM CV input. Connect any CV source (0V to +5V) to modulate Pulse Width here. The FM input accepts any control voltage to frequency-modulate the oscillator, with modes switchable between linear and exponential via the LIN/EXP switch. Honeyeater supports both hard and soft sync by patching an external oscillator’s output (ideally a sawtooth wave) to the SYNC input. Select between sync types via a jumper on the back of the module. When assembling the Honeyeater yourself, you have the option to use either a DIP-16 through-hole CEM3340 IC or a SOIC-16 SMD variant, which can be mounted using a small adapter board. HONEYEATER QUICK START GUIDE: HONEYEATER_V3_QUICK_START .pdf Download PDF • 453KB prev Up next

Mixer & VCA matrico / 3x3 bipolar matrix mixer with sum out / 10 HP ⇣ There are many creative ways to use matrix mixers for CV and audio processing. MATRICO is a full-featured matrix mixer in a small footprint that provides instant access to this modular creativity. 1/3 key features 3x3 Matrix Mixer Bipolar or Unipolar Input LED Low HP Size Performance-Orientated Mixing Wrong Polarity Protection specs & downloads width: 10 HP depth: 30 mm power: 35 mA @ +12V / 25 mA @ -12V documentation videos description / manual MATRICO has three inputs I - III which can be routed to any of the three outputs A-C. For each connection between I-III and A-C there is a separate potentiometer which acts as an attenuator/attenuverter. For each output A-C you can decide whether the signals should be processed unipolar or bipolar. The LEDs indicate whether a positive or negative signal is present at the respective input. They only show input signals, as it is so much easier to identify a signal to be mixed with other signals. There is also a sum output with LEDs that provides a mix of all outputs. prev Up next

Sequencer chasing lights / analog rhythm sequencer / 22 HP ⇣ Discover the comprehensive capabilities of chasing lights, a fully-featured analog trigger sequencer boasting 3 channels and 8 trigger steps per channel, channel chain and a clock divider. 1/3 key features 3x8 Steps Analog Sequencer 8 Trigger or Clock Outputs Clock Divider Channel Chaining Sum Output and B/C Swap Wrong Polarity Protection specs & downloads width: 22 HP depth: 28 mm power: 75 mA @ +12V / 48 mA @ -12V documentation videos description / manual CHASING LIGHTS is a 3-channel analog trigger sequencer with a total of 8 trigger or clock outputs. Each channel has 8 trigger steps that can be activated or inactivated with a push-button per step. LEDs indicate if a step is active and which step is currently playing in a sequence. The trigger signals are available at the output sockets A, B and C. Each sequence can be clocked at its own external clock rate. The A CLOCK input is normalized to the other clock inputs and also to the CLK THRU output to sync CHASING LIGHTS to other sequencers. In addition one CV RESET function is available per channel. The RST ALL button can be used to manually reset all sequences to the first step. It can also act as a HOLD function as long as the button is pressed or the CV input is high. This is especially useful if you want to change the sequence lengths spontaneously. The A/B/C LENGTH switches can be used to set three different lengths per channel. 2/3 and 8 for channel A, 5/6 and 8 for channel B and 5/7 and 8 for channel C. All channels are summed at the SUM output. Each channel can be enabled or disabled for summing using the A/B/C SUM switches. Outputs B and C can be swapped with the SWAP B/C button to create rhythm variations. Wait! No mutes? To have less HP and a better practical experience, the channels should be muted using external modules with on/off switches (such as the vactrol mute ONCE IN A WHILE) or mixers (like PHOEBE, SUM2 or STEREO SUM). The A CLOCK input is also routed to a clock divider. Three divider outputs provide six different clock divisions and can be switched off in the centre position of the corresponding switches. With CLK VARI the counting direction of the internal divider can be changed by CV. This can be used to create interesting clock changes. Channel CHAIN is one of the most interesting functions of CHASING LIGHTS. It is possible to chain all three channels one after the other to create sequences up to a length of 24 steps. There is also an external input CHAIN EXT that can be included in the chain creating even longer sequences. You can set the chain length from 2 to 4 steps, with 2 chaining only channel A and B and 4 steps chaining all channels plus the external input. You can control the speed at which the channels are chained one after the other manually or by CV. It is also possible to reset the chaining sequence to channel A by pressing the CHAIN RESET button or using control voltages. CHASING LIGHTS QUICK START GUIDE: CHASING_LIGHTS_QUICK_START .pdf Download PDF • 1.66MB prev Up next

Oscillator cyllene / classic analog vco with three sub-octaves / 12 HP ⇣ Presenting timeless waveforms including Sine, Triangle, Pulse and 3 Sub-Octaves this oscillator emerges as an exceptionally stable, precise, and awe-inspiring sonic source. Its brilliance truly emerges when engaged in frequency modulation. 1/3 key features Classic Analog VCO 4 Outputs: SINE, TRIANGLE, PULSE, SUB Oscillation from supersonic to sub-audible (LFO) 1V/Octave tracking Pulse Width Modulation with Attenuator Linear Frequency Modulation with Attenuator Exponential Frequency Modulation with Attenuator Integrated Frequency Divider Up to 3 Sub-octaves Attenuator for each Sub-octave Wrong Polarity Protection specs & downloads width: 12 HP depth: 28 mm power: 26 mA @ +12V / 19 mA @ -12V documentation videos description / manual Functioning as a quintessential VCO, it boasts a 1V/OCT input, both linear and exponential frequency modulation inputs, and comprehensive control over pulse width modulation. To manage incoming control voltage effectively, dedicated attenuators accompany each of the aforementioned inputs. Cyllene's oscillation spans the gamut from supersonic to sub-audible frequencies, endowing it with the versatility to serve as an LFO if desired. Beyond the realm of classic VCO attributes, Cyllene incorporates an integrated frequency divider. Through the SUB output jack, it delivers up to 3 sub-octaves in relation to the original signal. Fine-tuning the volume of each sub-octave is facilitated by the potentiometer seamlessly connected to SUB 0-8. By toggling the SUB ORIG switch, the choice between the original signal and a generated square wave on the initial octave is at your fingertips. Furthermore, the SUB WAVE Switch allows you to designate the source wave for the frequency divider. prev Up next

Modulation & Random clanches / branches with internal cv clock / 6 HP ⇣ CLANCHES is an 6 HP clock source and dual random gate. It is a modification of Émilie Gillet's module Branches. 1/3 key features Internal Clock Source Dual Random Gate CV Clock HOLD Function Probability CV Clock normalled to both Gates 3x LED Two separate Gate Inputs Probabilty CV Skiff friendly specs & downloads width: 6 HP depth: 28 mm power: 60 mA @ +12V / 35 mA @ -12V documentation videos description / manual The internal clock indicated by the LED located in the centre is normalled to both inputs of the random gate. If there is an external trigger patched to one of the IN jacks, this connection will be interrupted. The gate takes a trigger or gate as an input and routes it to either one of its two outputs A and B according to a random coin toss. You can manually adjust the internal clock rate. A Switch changes the range from slow over moderate to very fast.The CV input gives you the opportunity to use control voltages in order to adjust the clock speed. Any signal above 3V will vary the rate. If the signal drops below 3V the clock generator is forced to hold. This way you can generate very interesting rhythms by just patching a random signal or LFO into the Clock CV. The internal clock is furthermore supplied via the OUT jack. The two manual controls P1 and P2 and their corresponding CV inputs change the probability of a signal to be routed to one of its outputs. In extreme settings, the outcome is no longer random causing the module to behave like a voltage controlled switch. The two LEDs on top indicate which output of each channel has been selected to route the signal. In contrast to the original Branches module the two toggle switches simple change the behaviour if the P1 or P2 is set fully clock- or fully counter clockwise. If you hold the button for 2 seconds once the signal will be routed to A and B alternately with each incoming trigger. In normal mode the will just be routed to A (CW) or B (CCW). prev Up next

Modulation & Random tricay / tripple decay / 6 HP ⇣ Seamlessly trigger three versatile Decay Envelopes by patching a single trigger. 1/3 key features 3x Decay Trigger Multiplier LED indication Skiff friendly Wrong polarity protection specs & downloads width: 6 HP depth: 28 mm power: 38 mA @ +12V / 15 mA @ -12V documentation videos description / manual When you connect a trigger signal to TRIG 1, it's distributed to all three Decay Envelopes. This connection is disrupted when another cable is plugged into TRIG 2 or TRIG 3, allowing for independent triggering of the envelopes if desired. Adjust the decay length using the three potentiometers, spanning from quick and snappy to prolonged and release-like. This versatility suits a variety of sounds, including synth lines and percussions. The status of each Decay Envelope is conveniently displayed through an LED indicator. Voltage is generated and accessible via OUT 1, OUT 2, and OUT 3 jacks, providing options for modulation and sound generation in your setup. Furthermore, by inputting a trigger signal into TRIG 1 and configuring all decay settings fully counter-clockwise, Tricay can function as a Trigger Multiplier, expanding its utility and creative potential. prev Up next

Oscillator drum / digital drum module / 3 HP ⇣ DRUM is an excerpt of the Mutable Instruments PEAKS module. It was reduced to the max and only focuses on the 808 and FM Drum algorithms. 1/3 key features Digital Drum Module Two Modes: 808 & FM Manual and CV Trigger HP friendly Flip Panel with Descriptions for each Mode Based on the MI Peaks Algorithms Wrong Polarity Protection specs & downloads width: 3 HP depth: 65 mm power: 60 mA @ +12V / 2 mA @ -12V documentation videos description / manual There are two modes to be selected via a push button on the PCB: 808 DrumThis is an emulation of the well-known 808 kick drum. You have manual control over the FREQUENCY, PITCH ENVELOPE, TRANSIENT and DECAY. FM DrumThis is a digital drum synth based on FM synthesis. By turning the knobs you can change the FREQUENCY, FM AMOUNT, DECAY and COLOR of the drum sound. DRUM has an internal EQ that allows you to adjust the amount of bass applied to the signal using a trimmer on the PCB. This module also has a flip panel with descriptions per mode on each side. Both modes share a manual TRIG button to execute the drum sound, a TRIGGER INPUT and a signal OUTPUT. Released under cc-by-sa-3.0 license: Pichenettes Mutable Instruments prev Up next

Oscillator hh / analog hi-hat and noise generator / 4 HP ⇣ HH is a very simple, but handy little module that completes any modular drum rack. 1/3 key features Analog Hi-Hat and Noise Generator Internal Decay Envelope Internal VCA CV Control over VCA Offset CV Attenuator Adjustable Noise Colour: Brown, Pink, White Illuminated ST Modular Logo specs & downloads width: 8 HP depth: 28 mm power: 35 mA @ +12V / 25 mA @ -12V documentation videos description / manual HH is an analog Hi-Hat and Noise generator with an internal VCA and decay envelope. The Module can be triggered by a trigger signal at the TRIG Input. Using the DECAY potentiometer you can open and close the Hi-Hat. The ST Modular logo will flash according to the decay envelope. This may also be voltage controlled with any CV signal at the CV input. The voltage changes the internal VCA offset, but does not affect the decay envelope. The incoming voltage can be attenuated using the dedicated attenuator potentiometer. An LED indicates the current state of the voltage. Additionally you may also change the colour of the noise being generated with the COLOUR pot. Fully counter-clockwise the noise will equal Brown Noise with reduced high frequencies. At noon it will sound like Pink Noise, which is a bit louder at the low-frequency end of the spectrum, and softer at the high end. Almost fully clockwise it will be White Noise, broadly spread across the sound spectrum, sounding like a waterfall. Fully clockwise the noise will be boosted on all frequencies to have a more present noise spectrum. prev Up next

KRAKONG is a duophonic generative synthesizer with a sequencer per voice, FM crossover modulation, an additional random modulation sequencer, one multimode filter with VCA, a buffered multiple and a resettable LFO. The design includes a collection of manual controls and connections for patching and CV control. "Krakong fits seamlessly into a series of well-known generative semi-modular synthesizers. It invites you to lose yourself in hours of sound design and keeps surprising you with new sounds and sequences." MAIN FEATURES KRAKONG is a duophonic generative synthesizer with a sequencer per voice, FM crossover modulation, an additional random modulation sequencer, one multimode filter with VCA, a buffered multiple and a resettable LFO. The design includes a collection of manual controls and connections for patching and CV control. It fits into a standard Eurorack case with at least 80 HP (3U). Each of the unit's two voices consists of a triangle and a square wave oscillator, a shift register sequencer, a decay envelope generator and a filter-based gate. In addition to the two synthesizer voices, which can be manually distributed in the stereo field, a third ring-modulated output of the two voices can be mixed to the main output. The tempo of all sequencers is determined by a clock generator, which can be controlled internally or synchronised externally to any voltage (audio and CV). This musical instrument has a complete structure that allows for a wide range of sonic possibilities, from rhythmic drum patterns and tamed sonic chaos to textural and rough synth-sounds. The essence of this unit lies in the exploration of the interplay between the elements of the synthesiser, using the three sequencers and filters, manual controls and modulation patch points. It can be powered by a standard Eurorack PSU or a small ST Modular PSU PCB that can be built separately. INPUTS, OUTPUTS & FEATURES 2 Oscillators 1 Ring-modulated Output of the two Oscillators 1 CV OSC FM Cross-Modulation 2 CV Filter-based Gates 2 CV Decay Envelope Generators 1 CV Multi-mode Filter with two External Inputs and VCA 1 Noise Output 2 Shift Register Sequencers 1 Random Modulation Sequencer 1 CV Clock Generator 1 Resettable LFO 1 Buffered Multiple with Inverted Output 1 Mixer with stereo distribution (panning) OSC I and OSC II PULSE – Output of the PULSE waveform TRIANGLE – Output of the TRIANGLE waveform RNDM – Amount of random modulation of the RNDM SEQ applied to the oscillator´s frequency. FREQ – Manual control of the oscillators´s frequency. FREQ CV Input – CV frequency input with attenuator. The oscillators don´t track exactly 1V/Oct. The MOD´s square wave output is normalized to the OSC I CV input. The MOD´s triangle wave output is normalized to the OSC II CV input. NOISE OUT – Output of the internal NOISE GENERATOR GATE (OSC I & OSC II) IN – Audio input. The oscillator´s TRIANGLE output is normalized to this input. RNDM - Amount of random modulation of the RNDM SEQ applied to filter. This knob also acts as a attenuator for the GATE CV input. CV – CV input for the GATE cutoff. The RNDM SEQ CV output is normalized to this input. OFFSET – GATE cutoff offset FORCE – Amount of DECAY CV applied to the GATE Resonance of the OSC gates can be adjusted via a trimmer on the PCB DECAY (OSC I & OSC II) TRIG – CV input for triggering the DECAY envelope. The SERIAL SEQ TRIG output is normalized to this input. DEC OUT – DECAY output (OSC I Decay output can be set to inverted via jumper on the PCB) CV – CV DECAY input with attenuator. The RNDM SEQ CV output is normalized to this input. DECAY – Manual control of the DECAY length SERIAL SEQ (OSC I & OSC II) CLK IN – Sequencer clock input. The CLOCK GENERATOR´s output is normalized to this input. CLK DIV – The normalized CLOCK GENERATOR input can be divided by 2 or 8 (selectable via jumper on PCB). CV IN – Changes the locked note per clock according to an incoming CV signal. This signal is mixed with an internal noise source that generally generates random notes for the sequencer. GATE OUTPUT – Random or looped GATES CV OUT – Random or looped PITCH CV generated from a noise and CV input source. SCALE – Range of the pitch of CV OUT LENGTH – Select the length of a SEQUENCE. You can choose 4, 5, 6 or 7 (selectable via jumper on the PCB) or 8 steps. Please note that a change of the sequence length might also change the notes that are locked per clock signal, even in LOOP mode. LENGTH CV – CV control for selecting the sequence length RNDM/LOOP – Button to LOOP a sequence. If it is not looped it will generate random notes and gates. ADD – When pressed simultaneously with a CLOCK signal, it adds a random note and gate to the sequence. DEL – When pressed simultaneously with a CLOCK signal, it deletes a note and gate from the sequence. MOD (Resettable LFO) MOD KNOB – Manual control of the LFO RATE MOD RATE – Changes the RANGE of the LFO RATE from fast to slow. RST IN – Resets the LFO cycle on an incoming trigger signal. MULT (1 to 3 Buffered Multiple) IN – Multiple input. The MOD triangle waveform is normalized to this input. OUT (2x) – Buffered output of the multiplied signal. INV – Buffered and inverted output of the multiplied signal . RNDM SEQ (Random Modulation Sequencer) CHANGE – Turn this knob to create new random sequences or loop them STEP/∞/OSC SWITCH – Controls if the CHANGE button is influenced either via the STEP IN input or the OSC I PULSE waveform. In mid-position no additional changes are applied to the CHANGE button. STEP IN – CV input to control the CHANGE knob (if SWITCH is set to STEP) in order to created steps of looped and random sequences. CLK IN – CLOCK input for the RNDM SEQ. The CLOCK GENERATOR´s output is normalized to this input. RNDM OUT – Output of the RANDOM MODULATION SEQUENCER CLOCK (Internal Clock Generator) CLOCK – Manual control of the CLOCK rate CLOCK CV – CV input with attenuator to control the clock rate. The RNDM SEQ CV output is normalized to this input. EXT CLK – External Clock input that overrides the internal clock. Any signal can be patched to this input (CV or audio). THRESHOLD – Sets a voltage threshold at which a clock pulse is generated. With a low threshold, clock pulses are already generated for very low voltages and conversely with a high threshold, clock pulses are only generated at peak voltages. In this way, you can use an audio drum loop, for example, to generate a clock signal and control the amount of clocks generated. MLTMD FILTER (Multi-Mode Filter) CUTOFF – Manual control of the filter´s CUTOFF frequency RNDM - Amount of random modulation of the RNDM SEQ applied to filter. OVERLOAD IN – External input with attenuator. If you turn the attenuator past 12 o'clock, the incoming signal is starting to clip softly. FILTER IN - External input with attenuator. FM IN – Frequency Modulation input with attenuverter (bipolar). The internal LFO Triangle waveform is normalized to this input. RESONANCE – Feedback of the filter output to the input. This goes as far as self-oscillation. RESONANCE CV – CV input for RESONANCE control SLOPE – This button changes the LOWPASS and BANDPASS FILTER SLOPE from 2-pole (12db) to 4-pole (24db). BANDPASS/LOWPASS/HIGHPASS – Filter output of the corresponding filter modes V/OCT – CV input with 1V/OCT tracking. This way you can play the filter with self-oscillating resonance as a third synthesizer voice. VCA CV - Voltage controlled amplifier input that only affects the LOWPASS output. T² – Pre-Filter ring-modulated output of OSC I and OSC II triangle waveforms OSC FM (Oscillator FM Cross-Modulation) FM AMT – Amount of frequency modulation applied to the target (OSC I, OSC II or both) FM CV – CV input to control the frequency modulation amount DIRECTION – Choose the direction of frequency modulation: OSC I modulating OSC II, OSC II modulating OSC I or both modulation each other. OUT (Mixer and OSC I & OSC II Panning) LEFT/RIGHT – Stereo Output VOL I+II – Volume control of the T² output before it is routed to the MULTIMODE FILTER. If you want to use the MLTMD FILTER only with another sound source, simply turn this volume down. VOL II – Volume control of OSC II VOL I – Volume control of OSC I MIXER IN – External mixer input. Audio is directly routed to OUT. VOL IN – External mixer input volume control SPREAD – Extends the panning for OSC I and OSC II in opposite directions and thus distributes the two outputs in the stereo field. The ring-modulated output of OSC I and OSC II remains in the centre position. This way you can also use the stereo outputs as individual OSC outputs. QUICK START GUIDE Please click the image above to open or download the PDF file . SO MUCH TO EXPLORE! Use the multi-mode filter in self-oscillation as a third synth voice . Just turn down the I+II volume, patch a sequence to the v/oct input and use the vca! Add some noise to the mix by patching the noise output into the filter overload input. Turn the gate offsets up to unleash Krakong´s full droning capabilities , additionally cv modulate the OSC FM amount ! Use an external drumbeat to clock Krakong from an audio source . Play with the threshold to get different results! Don't forget to patch the CV output of the serial sequencers to the pitch input of the oscillators to get its full effect! Why not patching the pulse output into the gate input ? Or one of the many sequencer gate outputs into the decay trigger input? VIDEO AUDIO KRAKONG sounds, underlaid with an external beat. Each sample starts with a beat, then KRAKONG begins to play. Further down in the playlist follow some solo sounds. PANEL 80HP GALLERY 1/6 Up

DII·ONE is a compact MIDI controller and routing hub designed for modern hybrid music setups.   It combines USB MIDI, hardware MIDI, and a CV clock output in a single device, allowing all functions to operate simultaneously without compromises. rattlecore / piezo pre-amp PCB with high-pass filter / PCB only ⇣ Rattlecore is a compact, high-gain piezo preamp PCB with integrated high-pass filter designed for DIY noise boxes, contact mics and experimental sound sources. key features High-quality OPA1656-based preamp Adjustable gain from +10 dB up to +50 dB Integrated high-pass filter (47 Hz – 4.8 kHz) Optimized for piezo contact microphones Clean virtual ground via TLE2426 rail splitter Onboard power LED Protection diodes on input Compact PCB for easy enclosure builds Designed for 9V DC operation (battery or DC) Soft grounding option for enclosure → documents RATTLECORE_QUICK_START_GUIDE.pdf description / manual Rattlecore is a dedicated piezo microphone preamp and filter circuit designed for experimental sound design, noise instruments and DIY contact mic boxes. The circuit is built around a low-noise, high-performance op-amp stage and provides enough gain to bring even very weak piezo signals into a usable audio range. The gain can be adjusted via an onboard potentiometer, allowing anything from subtle amplification to aggressive boosting for noisy textures. A second stage implements an adjustable high-pass filter . This helps to remove low-frequency rumble. It also allows you to shape the tonal character of your sound source, from deep thumps to sharp clicks and textures. The PCB uses a virtual ground (rail splitter) to run cleanly from a single 9V supply . This keeps the design simple and makes it ideal for standalone DIY builds. This is not a complete instrument. The PCB design is provided as a DIY project component. You will need to: add your own piezo sensors build or design an enclosure add jacks, controls and mechanical parts install power supply socket or battery The design is intended for DIY builders who want to create their own custom noise boxes or experimental instruments. RattleCore works especially well with piezo contact microphones that capture vibrations from: metal objects springs surfaces resonant bodies Every build can sound completely different depending on what you attach to it. DIY Build Example Wooden enclsoure made by barebaric.com Up

SUPPORTING FILES This page provides you with all the essential documents for your DIY project. Feel free to download the necessary files at your convenience.