befaco-pony-vco

Befaco Pony VCO

Analog through-zero oscillator with wavefolder and VCA in 4HP

4 HP Eurorack module

Pony VCO is a fully analog Through-Zero oscillator with integrated wavefolder and dedicated VCA in only 4HP. Built around a Sound Semiconductors IC core, it offers exceptional tuning stability, TZ-FM for rich phase-cancellation timbres, wavefolding and PWM for harmonic complexity, hard sync, and LFO-range operation. Its musical character ranges from clean, stable tones to wildly complex folded and FM textures.

Features

  • Fully analog Through-Zero Frequency Modulation (TZ-FM) oscillator core
  • Based on Sound Semiconductors IC for stability and tracking accuracy
  • 8-octave range accuracy on 1V/OCT input
  • Seven-octave range via Oct selector (C1 to C7)
  • Four range settings on Freq knob: Full, Octave, Semitone, LFO
  • Four waveforms: Sine, Triangle, Ramp, Square
  • Integrated wavefolder (Timbre) for Sine, Triangle, and Ramp waveforms
  • Bipolar PWM control (Timbre) when Square waveform is selected
  • Hard Sync input for waveform reset and ripping tones
  • Dedicated internal linear VCA with CV input (0-8V unipolar)
  • Timbre CV input for voltage control over wavefolding or PWM
  • TZ-FM input is AC coupled (minimum signal frequency 15mHz) for pitch stability when combined with V/OCT

Controls & Jacks (14)

  • 1V/OCT— Calibrated frequency CV Input with 8 octave range accuracy. Voltage is summed to Oct selector, Freq control, and TZ-FM Input. 10Vp-p voltage
  • VCA CV— Amplitude control input for the internal VCA circuit. Unipolar control. 0-8V voltage range.
  • SYNC— Hard Sync Input. Forces the core to reset its cycle. 10Vp-p bipolar voltage range.
  • Timbre CV— Voltage control over Timbre. The voltage applied to this input is summed to the current position of the Timbre control. 10Vp-p voltage range
  • OUT— VCO main signal output. Voltage range 10Vp-p (bipolar).
  • Freq— Manual tuning control of the VCO. Its behavior is affected by the Range switch below.
  • TZ-FM— Through Zero Frequency Modulation Input. 10Vp-p bipolar voltage range. AC coupled with 15mHz minimum frequency.
  • Shape— Selects between four available waveforms: Sine, Triangle, Ramp, and Square.
  • Oct— Sets the frequency of the VCO in octave jumps. Covers seven octaves from C1 to C7 with Freq control at centre. 0 position marks the fifth oc
  • Timbre— Controls the amount of wave folding applied to the signal. With Square wave selected, turns into a bipolar PWM control.
  • Range— Sets the frequency range of the Freq control. Four settings: Full, Octave, Semitone, and LFO.
  • LFO
  • V/OCT— Calibrated frequency CV Input with 8 octave range accuracy. Voltage is summed to Oct selector, Freq control, and TZ-FM Input. 10Vp-p voltage
  • VCA— Amplitude control input for the internal VCA circuit. Unipolar control. 0-8V voltage range.

How-To Guides

  • Basic Pitched Tone Setup
  • Wavefolder Harmonic Sweep
  • Through-Zero FM Bell Tones
  • Hard Sync Ripping Lead
  • PWM String and Chorus Effect
  • Self-Contained Pluck Voice
  • Amplitude Modulation (AM) Synthesis
  • LFO Modulation Source
  • TZ-FM Formant Sweep with Envelope

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

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