Winterbloom Castor & Pollux II
Dual Juno-style DCO with chorus, hard sync, and an internal LFO
14 HP Eurorack module
Castor & Pollux II is a dual Juno-inspired voice built from two digitally controlled analog oscillators, each a modernized version of the Roland Juno 106 DCO. Every oscillator generates ramp, pulse, and sub waveshapes with onboard mixers, plus pulse-width control. The two oscillators are deeply intertwined: Pollux can follow and detune against Castor, and an internal LFO drives four modes - chorus, LFO PWM, LFO FM, and hard sync - selected with a single button. A crossfade mixer blends the pair into one combined output.
Features
- Two independent analog DCOs modeled on the Roland Juno 106
- Seven-octave pitch range with 1 V/octave tracking
- Three waveshapes per oscillator - ramp, pulse, and sub - with onboard mixers
- Pulse-width control and CV input for each oscillator
- Pollux follows Castor when its pitch CV is unpatched, for easy detuning and stacking
- Coarse, Fine, and Multiply pitch behaviors selected automatically by jack detection
- Internal LFO with switchable triangle, sine, sawtooth, or square shapes
- Chorus mode recreates the classic Juno analog chorus
- LFO PWM and LFO FM modes for pulse-width and frequency modulation of both oscillators
- Hard sync mode for metallic, harmonically rich timbres
- Crossfade mixer blends the two oscillators into one combined output
- Tweak overlay adds extra-fine tuning and LFO rate control on the existing knobs
Controls & Jacks (21)
- Castor Pulse Width
- Pollux Pitch
- Pollux Pulse Width
- LFO
- Crossfade
- Pollux Pitch CV In
- Castor Pitch
- Castor Sub Mix
- Castor Pitch CV In
- Castor Pulse Mix
- Pollux Pulse Mix
- Castor Output
- Castor Pulse Width CV In
- Pollux Pulse Width CV In
- Pollux Ramp Mix
- Crossfade Output
- Castor Ramp Mix
- Pollux Output
- Mode
- Pollux Sub Mix
- Mode LED
How-To Guides
- Classic Juno bass
- Detuned two-oscillator stack
- Juno-style chorus pad
- Hard sync lead
- LFO pulse-width motion
Explore the interactive Castor & Pollux II panel on BleepDex — tap any control to learn what it does.
