Doepfer A-143-9 VC Quadrature LFO/VCO

The Doepfer A-143-9 is a versatile voltage-controlled oscillator module generating four outputs, each shifted by 90 degrees in phase (quadrature). This makes it perfect for creating complex modulations, phase effects, and stereo panning within a modular synth setup.

It can function both as a low-frequency oscillator (LFO) for modulation purposes and as an audio-frequency oscillator (VCO) for sound generation. With precise voltage control and stable frequency response, the A-143-9 offers broad possibilities for experimental sound design and dynamic synthesizer patches.