Endorphin.es Furthrrrr Generator

Name: Furthrrrr Generator
Brand: Endorphin.es

Analog dual complex oscillator with through-zero FM and wavefolder

30 HP Eurorack module

The Furthrrrr Generator is an analog dual-oscillator complex oscillator inspired by classic West Coast architecture. It features two independent VCOs (carrier and modulator) with through-zero FM, hard and soft sync, a built-in wavefolder, and a modulation bus. The module excels at creating rich harmonic timbres through its extensive cross-modulation capabilities.

Features

Dual analog VCOs (carrier + modulator)
Through-zero frequency modulation
Analog wavefolder
Hard and soft sync
Symmetry/waveform shaping
1V/oct tracking
Multiple simultaneous waveform outputs
Internal modulation bus

Controls & Jacks (55)

Mood Wave LED 1— Mood wave source indicator LED (first position)
Mood Wave LED 2— Mood wave source indicator LED (second position)
Symmetry— Controls the balance between even and odd harmonics in the carrier waveshaper. Clockwise emphasizes odd harmonics (pure square at full CW).
Modulator Sine Out— Direct sine wave output from the modulator oscillator.
Ext In— External audio input for the Mood Wave modulation bus. Replaces the internal sample & hold source when a cable is inserted. Can inject any s
Carrier Wave— Selects the carrier oscillator waveform fed to the harmonic section and Mood Index modulation bus.
Symmetry CV In— CV input for voltage control of the Symmetry waveshaper parameter.
Carrier Sine Out— Direct sine wave output from the carrier oscillator (before harmonic processing).
Carrier Saw Out— Direct saw (falling ramp) wave output from the carrier oscillator.
Carrier Wave LED— Indicates the currently selected carrier waveform.
Mood Wave LED 4— Mood wave source indicator LED (fourth position / random S&H)
Mood Wave LED 3— Mood wave source indicator LED (third position)
Balanced— Enables balanced (ring) modulation of the carrier by the modulator via the Mood Index bus. Multiplies the two oscillator signals, producing
Modulator Square Out— Direct square wave output from the modulator oscillator.
Modulator Saw Out— Direct saw (falling ramp) wave output from the modulator oscillator.
Balanced LED— Indicates that balanced modulation destination is active on the Mood Index bus.
Final Out 1— First final output from the carrier harmonic section (magic eye). The fully processed signal through the Symmetry, Order, and Furthrrrr wave
Order CV In— CV input for voltage control of the Order waveshaper parameter.
Carrier Noise Out— White (flat) noise output from the carrier oscillator. Also used internally as the source for sample & hold in the Mood Wave random mode.
Mood Wave— Cycles through modulation waveforms: sine, triangle, saw, square, and random sample & hold. The selected waveform modulates the carrier via
Carrier Square Out— Direct square wave output from the carrier oscillator. Pulse width affected by the Symmetry control.
Order— Saturates high-order harmonics, acting as an approximation of a low-pass filter on the harmonic content. Works with Symmetry and Furthrrrr t
Amplitude— Enables amplitude modulation of the carrier by the modulator via the Mood Index bus. Audio-rate AM produces ring-mod-like artifacts; sub-aud
Low Range— Switches the modulator oscillator into LFO mode for sub-audio rate modulation. LED blinks at the LFO rate and the tuner LEDs shut off.
Lock— Three-position sync lock switch. Pre-routes synchronization from the modulator to the carrier: left = soft sync, center = off, right = hard
Amplitude LED— Indicates that amplitude modulation destination is active on the Mood Index bus.
Carrier Soft Sync In— Soft sync input for the carrier oscillator. Inverts the waveform direction without restarting the cycle, producing complex harmonic saturati
Modulator Hard Sync In— Hard sync input for the modulator oscillator. Fully restarts the oscillator cycle, enriching output with even and odd harmonics.
Modulator Soft Sync In— Soft sync input for the modulator oscillator. Inverts the waveform direction without restarting the cycle, producing complex harmonic satura
Furthrrrr CV In— CV input for voltage control of the Furthrrrr waveshaper parameter.
Frequency— Enables frequency modulation of the carrier by the modulator via the Mood Index bus. Can be switched between linear and exponential FM via a
Frequency LED— Indicates that frequency modulation destination is active on the Mood Index bus.
Final Out 2— Second final output from the carrier harmonic section (magic eye). Identical to Final Out 1, providing a second connection point for the pro
Frequency (Modulator)— Sets the frequency of the modulator oscillator. Multi-turn knob sweeps up to 10 octaves. The modulator can operate independently or modulate
Frequency (Carrier)— Sets the fundamental frequency of the carrier (principal) oscillator. Multi-turn knob sweeps up to 10 octaves with accurate 1V/oct tracking.
Mood Index— Controls the depth of internal modulation from the modulator to the carrier oscillator. Acts as a wet/dry control for the selected modulatio
Furthrrrr— The signature waveshaper control. Emphasizes and magnifies the harmonic content defined by Symmetry and Order, producing dramatic timbral va
Modulator Tune LED R— Right Looney Tuner LED for the modulator oscillator. Lights when the oscillator frequency is above (sharp of) the nearest A-note. Both LEDs
Carrier Tune LED R— Right Looney Tuner LED for the carrier oscillator. Lights when the oscillator frequency is above (sharp of) the nearest A-note. Both LEDs li
Modulator Tune LED L— Left Looney Tuner LED for the modulator oscillator. Lights when the oscillator frequency is below (flat of) the nearest A-note.
Mood Index LED— Indicator LED for the Mood Index modulation bus.
Modulator FM Atten— Attenuator for the modulator linear FM input. Controls the depth of linear frequency modulation applied to the modulator oscillator.
Carrier Furthrrrr Atten— Attenuator associated with the carrier harmonic section. Controls modulation depth for the Furthrrrr waveshaper CV input.
Modulator CV Atten— Bipolar attenuverter for the modulator exponential CV input. Controls the depth and polarity of pitch modulation from the CV In jack below.
Mood Index CV Atten— Bipolar attenuverter for the Mood Index CV input. Controls the depth and polarity of external voltage control over the modulation index.
Carrier FM Atten— Attenuator for the carrier linear FM input. Controls the depth of linear frequency modulation applied to the carrier oscillator.
Carrier CV Atten— Bipolar attenuverter for the carrier exponential CV input. Controls the depth and polarity of pitch modulation from the CV In jack below.
Modulator CV In— Exponential FM input for the modulator oscillator. Use the attenuverter knob above to control depth and polarity. DC-coupled for pitch CV.
Modulator FM In— Linear FM input for the modulator oscillator. AC-coupled. Use the red attenuator knob above to control depth. Pre-routed from carrier final
Modulator Key In— Direct 1V/oct pitch input for the modulator oscillator. Unattenuated, for keyboard/sequencer tracking. Normalled to bus CV when no cable is
Carrier CV In— Exponential FM input for the carrier oscillator. Use the attenuverter knob above to control depth and polarity. DC-coupled for pitch CV.
Mood Index CV In— CV input for voltage control of the Mood Index modulation depth. Use the attenuverter knob above to control depth and polarity.
Carrier Furthrrrr CV In— CV input for voltage control of the Furthrrrr waveshaper depth, with attenuator knob above.
Carrier Key In— Direct 1V/oct pitch input for the carrier oscillator. Unattenuated, for keyboard/sequencer tracking. Normalled to bus CV when no cable is in
Carrier FM In— Linear FM input for the carrier oscillator. AC-coupled (or through-zero with Strong Zero VCO core). Use the red attenuator knob above to con

How-To Guides

Through-Zero FM Lead
Evolving Complex Drone

Explore the interactive Furthrrrr Generator panel on BleepDex — tap any control to learn what it does.