The DPO from Make Noise is a dual Voltage Controlled Oscillator designed for complex waveshapes. Modeled after the classic Buchla Model 259 Dual Oscillator, it continues the tradition of early synthesis while offering a fresh take for Eurorack modular systems. The DPO is arranged to easily modulate and cross-modulate between the two oscillators without patch cables, delivering complex timbres without the cable clutter.

The modulation oscillator (left) has a toggle switch that changes its function from a classic VCO to an LFO, synchronized oscillator, or phase-locked oscillator. This significantly affects the modulation style and timbre when this oscillator modulates the main oscillator. The modulation index between them can be controlled manually or via CV. Both oscillators feature 1V/Oct pitch scaling, as well as linear and exponential Frequency Modulation.

On the right side of the module is the main VCO's waveshaping section. It has two controls for the waveshape plus a wave "fold" amount, all of which can be voltage controlled. This waveshape is output through the "Final" output and can create timbres unlike those generated by classic VCOs and filters.

Width: 28hp

DPO FEATURES

• Dual Primary Oscillator Module
• Vintage-voiced, all analog
• Triangle core with sine, saw, spike & square wave shapes
• Dedicated FM and modulation buses
• Modulation source signals are internally routed with associated destination CV attenuators setting final depths
• Mod Bus can use an external source (patched at EXT. Source input) instead of VCO 1 Sine
• Bi-directional dynamic FM bus allows for circular FM
• VCO A features a hard sync circuit which, combined with dynamic FM, produces complex sounds
• VCO A operates as an LFO, perfect for slow morphing of VCO B timbres
• VCO B offers complex timbral control through a 3-parameter waveform shaping and dynamic FM
• Utilizes vactrols
• Pairs well with the Echophon

More information - Make Noise Music