Unique, custom and small batch musical instruments. Made in North Dakota.

Four BBD-based audio paths create lush sounding chorus, vibrato and flange effects. Each BBD path has its own dedicated output, allowing for quadraphonic, surround-style chorusing. Stereo summing outputs are also included.

Four multimode diode filters run in parallel, providing filtering for the four BBD audio paths. There's a bandpass mode, and a multimode, which is sweepable from lowpass, through notch, to highpass.

The real thing. The entire audio path is true analog from the inputs to the outputs. Even the modulators are all-analog.

Five conventional LFO waveforms are available as additional BBD clock modulation. Rate ranges from 0.1Hz to 40Hz. 

The Quadrature LFO produces four sine waves, each 90 degrees out of phase with the next. It can be used to modulate the four BBD clocks, producing swirling four-channel chorusing.

This modulator can produce signals similar to a Sample & Hold, but with the addition of an adjustable slew limiter and a "chaos" clock-time randomizer. Add anything from subtle nuances to extreme glitches to your sound.

A high quality, dual-axis joystick can be assigned to a number of destinations, allowing for even more expressive control.

Soft-touch, illuminated fader caps round out the experience.

Eurorack-compatible 1/8" (3.5mm) TS audio and CV inputs and outputs are included. 

Heavy duty 1/4" (6.35mm) TRS audio inputs and outputs are also included, supporting balanced and unbalanced audio.

We've spent hundreds of hours auditioning the subtle differences in tones produced from various component chemistries at specific locations in the circuit topologies, to arrive at a the sound we call Retrogradus.

Two BBD-based audio paths for true stereo echo. Longest delays up to 1638ms in stereo, or combined into mono for up to 3276ms. Tap Tempo is available while in Digitally Controlled VCC mode, and a frequency counter is available while in Analog Controlled VCC mode.

Two multimode diode filters run in parallel, providing stereo filtering for the two BBD audio paths. There's a bandpass mode, and a multimode, which is sweepable from lowpass, through notch, to highpass. Selectable PRE and POST-echo position.

The real thing. The entire audio path is true analog from the inputs to the outputs. The LFO and Texture generators are analog. 

Five conventional LFO waveforms are available as additional BBD clock modulation. Rate ranges from 0.1Hz to 40Hz. 

The clock that drives the echo has a pure-analog mode, switchable to a digitally-assisted-analog mode for Tap Tempo. For TT mode, an MCU constantly monitors the analog clock's frequency, adjusting it subtly to achieve the desired tempo. There's a Tap button, and a euro jack for tap input.

This modulator can produce signals similar to a Sample & Hold, but with the addition of an adjustable slew limiter and a "chaos" clock-time randomizer. Add anything from subtle nuances to extreme glitches to your sound.

A high quality, dual-axis joystick can be assigned to a number of destinations, allowing for even more expressive control.

Soft-touch, illuminated fader caps round out the experience.

Eurorack-compatible 1/8" (3.5mm) TS audio and CV inputs and outputs are included. 

Heavy duty 1/4" (6.35mm) TRS audio inputs and outputs are also included, supporting balanced and unbalanced audio.

7-Segment readout displays the echo rate in BPM, milliseconds, or raw clock frequency. An animated bar graph borrowed from the R70M displays your current echo position or VCC modulation voltage.

Single channel or multi-channel

Independent or syncable channels

Tap Tempo

MIDI Tempo

Syncable to Digital Looper

Single channel or multi-channel

Tap and MIDI Tempo

Color-matched hi-res OLED Display

Syncable to Analog Delay

Optional SD card and/or Patch storage (requires Patch Memory feature to be added)

Retrogradus Diode Multimode

Retrogradus 4, 8, 12, 16 pole OTA Phaser

"4072" style Low Pass 24dB slope

"MS20" style High and Low Pass 12dB slope

"Ladder" style Low Pass 12, 18, 24, 36dB slopes with exclusive low-end boost

Stereo pan between left and right

Quadraphonic for 360 degree panning

Stereo

Quadraphonic

100 or 1000 patch storage and recall with 7-Segment LED display

Vactrol Optical Compressor

Vactrol Optical Expander

(both vactrols are sidechain capable)

Transformer Colorization

High Frequency Exciter

Sweepable Mid Frequency Exciter

Low Frequency Enhancer

Support for bender, CC, patch change and tempo (where applicable). NO USB support!

Standard Analog LFO

Quadrature Analog LFO

Retrogradus Texturizer

Envelope Follower

ADSR Envelope Generator

Individual buttons and faders for modulations or matrix-style modulation patching

Fixed audio path or matrix-style dynamic audio patching

Headphone jack w/source select

Joystick

CV input/output jacks

Instrument-level input jack (for guitars)

VU Meters & Modulation Meters (LED Bars)