Endorphin.es Furthrrrr Generator
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.
