Herzlich Labs

A 2hp module containing four independent signal inverters that shift the phase of input signals by 180 degrees, useful for fixing phase errors and other creative applications.

An 8hp DC-coupled precision matrix mixer with LED-indicated routing for mixing audio, CV, triggers and gates.

A passive 2hp Eurorack module with three independent performance mute switches for cutting audio or CV signals with a click.

A passive 2hp Eurorack module combining a stereo mute, bidirectional A/B switch, and 3.5mm stereo TRS to mono TS integrator for stereo signal routing.

A compact 10hp 4x3 matrix mixer for routing up to four input signals to three destinations with simultaneous full mixdown.

A 2hp precision buffered multiple using high-precision op-amps and resistors for accurate signal multiplication of audio and CV.

A compact 28hp 8x8 DC-coupled matrix mixer with buffered inputs/outputs and LED-indicated latching switches for routing audio and CV.

A 2hp dual full-wave rectifier module that converts negative waveform portions to positive, with an inverted secondary output.

A 2hp dual active averaging mixer that functions as two 3-to-1 mixers or one 6-to-1 mixer for CV and audio.

A passive Eurorack logic module combining up to eight CV, trigger, clock or audio signals and switching the strongest signal to one of two output buses.

An 8hp Eurorack utility module combining ten functions including a DC source, buffered multiple, mixer, rectifiers, gate-to-trigger generator, attenuverter and offset generator.

A passive force-sensing attenuator module that controls signal level via pressure applied to a squishy button, adding attack and decay characteristics.

A passive force-sensing attenuator module that controls signal level via pressure applied to a squishy button, adding attack and decay characteristics.

A passive force-sensing attenuator module that controls signal level via pressure applied to a squishy button, adding attack and decay characteristics.

A passive send, return and bypass utility module for switching between dry and wet signal paths or using as an A/B switch.

A passive send, return and bypass utility module for switching between dry and wet signal paths or using as an A/B switch.

A passive send, return and bypass utility module for switching between dry and wet signal paths or using as an A/B switch.

A passive gate-to-trigger converter module that generates a short trigger on the leading edge of a gate signal.

A passive gate-to-trigger converter module that generates a short trigger on the leading edge of a gate signal.

A passive gate-to-trigger converter module that generates a short trigger on the leading edge of a gate signal.

An 8hp Eurorack module offering six latching switches and two momentary switches to generate and control gate signals, with LED feedback for each switch.

A passive Eurorack module that splits a bipolar waveform into its positive and negative halves, or combines two waveforms into a new bipolar waveform. It accepts both audio and CV signals.

A passive bidirectional half-wave rectifier module that splits a waveform into positive and negative halves, or combines two waveforms into a new bipolar signal.

A 4hp Eurorack utility module combining a buffered multiple, a three-to-one active mixer, and a signal inverter with half-wave and full-wave rectification.

A passive hybrid 0hp/1U module that senses ambient or direct light to attenuate an audio or CV signal, acting as a light-controlled attenuator or theremin-like performance tool.

A passive hybrid 0hp/1U module that senses ambient or direct light to attenuate an audio or CV signal, acting as a light-controlled attenuator or theremin-like performance tool.

A passive hybrid 0hp/1U module that senses ambient or direct light to attenuate an audio or CV signal, acting as a light-controlled attenuator or theremin-like performance tool.

A 2hp Eurorack module with three manual push-button gate generators, each outputting a 5v gate signal, available in latching or momentary switch action.

A compact 2hp Eurorack crossfader with active circuitry and a smooth sliding potentiometer for fading between two signals.

A 2hp Eurorack module with three manual push-button gate generators, each outputting a 5v gate signal, available in latching or momentary switch action.

A 2hp Eurorack module containing four passive gate to trigger converters, each generating a 2ms trigger from the leading edge of a gate input, sharing a single input.

A 2hp dual passive half-wave rectifier for extracting positive and negative half-waves from audio or CV signals.

A 2hp dual passive mixer functioning as a dual 3-to-1 or 6-to-1 mixer for audio, CV, clock or triggers.

An 8hp Eurorack utility and audio mixer with four cascading channels offering CV/offset generation, attenuation, attenuversion, and visual LED feedback.

A passive latching mute switch for CV and audio signals in a hybrid 1U/0hp format, providing tactile click feedback to toggle a signal on or off without imparting actuation noise.

A passive latching mute switch for CV and audio signals in a hybrid 1U/0hp format, providing tactile click feedback to toggle a signal on or off without imparting actuation noise.

A passive latching mute switch for CV and audio signals in a hybrid 1U/0hp format, providing tactile click feedback to toggle a signal on or off without imparting actuation noise.

A passive linear attenuation utility for CV and audio signals in a hybrid 1U/0hp format, used to control the intensity of LFOs, envelopes or audio.

A passive linear attenuation utility for CV and audio signals in a hybrid 1U/0hp format, used to control the intensity of LFOs, envelopes or audio.

A passive linear attenuation utility for CV and audio signals in a hybrid 1U/0hp format, used to control the intensity of LFOs, envelopes or audio.

A passive utility that limits the slew rate of digital signals, gates, triggers, and square waves, with two settings ranging from modest slewing to extreme softening.

A passive utility that limits the slew rate of digital signals, gates, triggers, and square waves, with two settings ranging from modest slewing to extreme softening.

A passive utility that limits the slew rate of digital signals, gates, triggers, and square waves, with two settings ranging from modest slewing to extreme softening.

A passive stereo attenuator that accepts both CV and stereo audio signals, allowing simultaneous attenuation of two CV signals or one stereo audio signal.

A passive stereo attenuator that accepts both CV and stereo audio signals, allowing simultaneous attenuation of two CV signals or one stereo audio signal.

A passive stereo attenuator that accepts both CV and stereo audio signals, allowing simultaneous attenuation of two CV signals or one stereo audio signal.

A passive stereo attenuator module for Eurorack that attenuates stereo audio or CV signals down to usable levels. It is normalled so a mono input is repeated on both outputs.

A 4hp Eurorack module containing four passive attenuators for adjusting signal levels.

A 6hp four-channel stereo audio mixer with one knob per channel, a single output, and level-indicating LEDs. Mono signals input on the left channel are normalized to both channels.

The R2R is a passive 8-bit R2R ladder DAC that converts eight digital signals into one analog output, and can also be used as a weighted mixer or fixed attenuator.

A 2hp stereo attenuverter module with two channels of linked attenuversion, allowing smooth inversion of signals via a sliding potentiometer.

A passive photovoltaic CV generator that creates up to 5 volts of CV from ambient light, offered in a hybrid 0hp/1U format for use as an enclosed module or bare 1U panel.

A passive photovoltaic CV generator that creates up to 5 volts of CV from ambient light, offered in a hybrid 0hp/1U format for use as an enclosed module or bare 1U panel.

A passive photovoltaic CV generator that creates up to 5 volts of CV from ambient light, offered in a hybrid 0hp/1U format for use as an enclosed module or bare 1U panel.

A passive bidirectional adapter that splits a 3.5mm TRS stereo signal into separate mono Left and Right Eurorack signals, or combines two mono signals into a single stereo TRS output.

A passive stereo FX bypass module with two parallel bypass circuits for managing stereo effects or dual mono A/B switching.

A 4hp Eurorack module that converts stereo signals between Eurorack and instrument/line level, allowing integration with external pedals and rack effects, and amplifying piezos or electric guitars back up to Eurorack level.

A 2hp passive low pass gate module featuring hand-built phosphorescent vactrols with UV LEDs for plucked attacks and extended decay times.

A passive 2hp Eurorack waveshaper that folds and bends waveforms into new shapes, and can also function as a passive VCA when connected in reverse.

A passive hybrid 0hp/1U module offering two independent 1-pole filters, HPF and LPF, that can also be used together as a 2-pole bandpass filter.

A passive hybrid 0hp/1U module offering two independent 1-pole filters, HPF and LPF, that can also be used together as a 2-pole bandpass filter.

A passive hybrid 0hp/1U module offering two independent 1-pole filters, HPF and LPF, that can also be used together as a 2-pole bandpass filter.

The Omen is a dual low pass gate module with two -6dB resonant filters, custom built vactrols, built-in CV attenuation, and three cutoff modes per filter. It can function as two discrete LPGs or as one 4-pole resonant LPG.

A single pole -3 dB passive high pass filter with high quality components, covering a range from 31 Hz to 16 kHz. It is used to gently cut low frequencies from a signal.

A single pole -3 dB passive high pass filter with high quality components, covering a range from 31 Hz to 16 kHz. It is used to gently cut low frequencies from a signal.

A single pole -3 dB passive high pass filter with high quality components, covering a range from 31 Hz to 16 kHz. It is used to gently cut low frequencies from a signal.

A single pole -3 dB passive low pass filter with high quality components, covering a range from 31 Hz to 16 kHz. It accepts both CV and audio signals for gentle filtering.

A single pole -3 dB passive low pass filter with high quality components, covering a range from 31 Hz to 16 kHz. It accepts both CV and audio signals for gentle filtering.

A single pole -3 dB passive low pass filter with high quality components, covering a range from 31 Hz to 16 kHz. It accepts both CV and audio signals for gentle filtering.

A 2hp dual passive low pass gate with hand-built vactrols producing organic plucked attacks and gentle decays.

A passive dual low pass gate module using two hand-built vactrols with a single cutoff control, designed for stereo signal processing with internal normalization.

A passive dual stereo high-pass filter module in 2hp Eurorack format, useful for EQ'ing and small filtering tasks such as cutting rumble before a reverb.

A passive dual stereo low-pass filter module in 2hp Eurorack format, useful for submixing, tone control and cutting high frequencies.

A passive averaging mixer that accepts up to three inputs of audio, CV, envelopes, clock, or triggers. It succeeds the Herzlich Labs Plenum with the same function in a nicer enclosure.

A passive averaging mixer that accepts up to three inputs of audio, CV, envelopes, clock, or triggers. It succeeds the Herzlich Labs Plenum with the same function in a nicer enclosure.

A passive averaging mixer that accepts up to three inputs of audio, CV, envelopes, clock, or triggers. It succeeds the Herzlich Labs Plenum with the same function in a nicer enclosure.

A passive multiple that creates 3 identical copies from 1 input signal, accepting both CV and audio signals.

A passive multiple that creates 3 identical copies from 1 input signal, accepting both CV and audio signals.

A passive multiple that creates 3 identical copies from 1 input signal, accepting both CV and audio signals.

A passive multiple that replicates a signal to multiple destinations, functioning as either a 1x8 mult or a 2x4 mult since the top inputs are normalled to the lower inputs.

The MMI Astra is an active touch and pressure controller for Eurorack that uses a vactrol and slew limiter to generate or shape CV and audio signals. It can operate from an internal 5v source or process a patched-in signal, with the front touch plate controlling attenuation and amplification via pressure and position.

The MMI Helios is a passive touch controller module with two I/O jacks, either of which can act as input or output, forming connections when both touch plates are touched simultaneously. It complements other MMI devices and can be joined with additional Helios units for larger control surfaces.

The MMI Node is a single passive touch pad controller in a hybrid 1U/0hp format, usable standalone or in combination with other MMI units to control CV and audio signal intensity via touch and pressure.

The MMI Node is a single passive touch pad controller in a hybrid 1U/0hp format, usable standalone or in combination with other MMI units to control CV and audio signal intensity via touch and pressure.

The MMI Node is a single passive touch pad controller in a hybrid 1U/0hp format, usable standalone or in combination with other MMI units to control CV and audio signal intensity via touch and pressure.

The MMI Titan is a standalone touch controller with gold touch-sensitive pattern panels acting as inputs and outputs for audio, LFO, CV, trigger, gate, offset or clock signals, plus two stereo filters usable as high pass, low pass or passive bandpass filters. It requires no external power to operate.

A 2hp Eurorack module that provides an active stereo headphone and line-level output with a volume slider, converting modular signals for external listening.

A passive Eurorack module that accepts mono or stereo input and splits it to two stereo TRS headphone outputs for shared listening.

A passive Eurorack module that accepts mono or stereo input and splits it to two stereo TRS headphone outputs for shared listening.

A passive Eurorack module that accepts mono or stereo input and splits it to two stereo TRS headphone outputs for shared listening.

A passive Eurorack module with two independent gate-to-trigger generators and bypass switches. It truncates gate or other signals into short trigger pulses.

A passive Eurorack module with two independent gate-to-trigger generators and bypass switches. It truncates gate or other signals into short trigger pulses.

A passive Eurorack module with two independent gate-to-trigger generators and bypass switches. It truncates gate or other signals into short trigger pulses.

A dual 3:1 analog passive OR logic module for CV, clock, gate and trigger signals, passing the strongest current signal while blocking others; can also process audio for hard-clipped harmonics.

A passive manual crossfader for CV and audio signals that closes fully at either end without bleed, usable also as a panner by swapping input and output, in a hybrid 1U/0hp format.

A passive manual crossfader for CV and audio signals that closes fully at either end without bleed, usable also as a panner by swapping input and output, in a hybrid 1U/0hp format.

A passive manual crossfader for CV and audio signals that closes fully at either end without bleed, usable also as a panner by swapping input and output, in a hybrid 1U/0hp format.

A 2hp panner and balance control module with a long fader for smoothly panning or balancing between an input and two outputs, usable for panning, wet/dry control or as an attenuator.

A passive 0hp/7hp 1U diode fuzz distortion module for degrading and distorting incoming audio signals.

A passive 0hp/7hp 1U diode fuzz distortion module for degrading and distorting incoming audio signals.

A passive 0hp/7hp 1U diode fuzz distortion module for degrading and distorting incoming audio signals.

A two-channel passive random signal generator that produces clicks, fizzes and chaotic CV/audio signals from an input CV source, in a hybrid 0hp/1U format.

A two-channel passive random signal generator that produces clicks, fizzes and chaotic CV/audio signals from an input CV source, in a hybrid 0hp/1U format.

A two-channel passive random signal generator that produces clicks, fizzes and chaotic CV/audio signals from an input CV source, in a hybrid 0hp/1U format.

A 3D-printed custom fader cap designed to fit 4mm x 1.2mm fader levers for improved grip and control.

Gold-plated brass dress nuts designed to fit 3.5mm jack sockets on Eurorack module panels for a matching black and gold aesthetic.

The Optika VCA is a dual optical VCA built with handmade vactrols, offering a non-linear, characterful sound that can be pushed into overdrive for added harmonics.

A flexible black silicone Eurorack power cable that resists kinking and heat, designed for easy routing in tight spaces.

A passive stereo inductive field recording device that picks up electromagnetic signals for use with body contact, allowing electromagnetic fields to be captured or amplified in stereo.

A 12hp performance mixer and mute controller with four channels of soft vactrol muting controlled by mechanical switches, plus solo switches that override the mute state, designed in collaboration with Bries.

A mounting adapter that lets a 2hp 3U module be installed horizontally in a 1U or 3U Eurorack rail span, with included bolts and nuts.

A 4hp Eurorack saturation and distortion module with dual op-amp gain stages and switchable diode types, including genuine Cold War-era Germanium diodes.

A 3hp manual gate and trigger generator Eurorack module with latching and momentary buttons, each producing gate and trigger outputs.