SonicProjects ‘OP-X PRO-II’: A Virtual Analog Synthesizer featuring Voice-Based Detuning Features for Unequaled Rich and Organic Sound

The Music Telegraph | Text 2021/06/04 [12:32]

SonicProjects ‘OP-X PRO-II’: A Virtual Analog Synthesizer featuring Voice-Based Detuning Features for Unequaled Rich and Organic Sound

The Music Telegraph| 입력 : 2021/06/04 [12:32]




SonicProjects ‘OP-X PRO-II’: A Virtual Analog Synthesizer featuring Voice-Based Detuning Features for Unequaled Rich and Organic Sound 



The Swiss research-base virtual instrument developer company SonicProjects has released 'OP-X PRO-II' (version 1.2.) — The virtual analog synthesizer featuring voice-based detuning features for an unequaled rich and organic sound. OP-X PRO-II version 1.2 is the new cross-platform version of OP-X PRO-II featuring AU / VST2 / VST3 and 64 bit support with some changes in the patch system and in the MIDI engine.


OP-X PRO-II is a 12-voice virtual analog synthesizer originally based on the legendary ‘Oberheim OB-X’. Although OP-X PRO-II was originally an emulation of Oberheim OB-X, during its evolution the engine was extended with features borrowed from various other iconic synthesizers of this era, which makes OP-X PRO-II incredibly versatile and allows it to clone the sounds of almost any analog synths including Minimoog, Prophet-5, Jupiter-8,  Matrix-12, SH-2000, Elka Synthex, Crumar BIT99 and ARP Pro Soloist. 



▲ OP-X PRO-II (Rack Edition)

© SonicProjects

The technical structure of OP-X PRO-II engine is based on 12 completely independent single voices which correspond to the voice boards of real analog polyphonic synthesizers. Each single voice in fact is an independent mono-synth, each voice has its own signal path and each voice differs very slightly in its sound by default, as it was the case in real analog synthesizers too, caused by device tolerances. This unintended imperfectness is one of the main reasons for the organic and lively sound of the old legendary synthesizers.


OP-X PRO-II does not simply clone voices to achieve polyphony. Its unique Separate Voice Design (SVD) emulates the exact audio signal flow and voices structure of real voltage controlled polyphonic analog synthesizers using a separate independent mono-synth for each voice including all the slight variations and detunings between the single voices which gave these synths that lively and organic sound. These detunings can be controlled globally and also can be edited in every tiny detail for each voice on demand. 



© SonicProjects

OP-X PRO-II is supercharged with features inspired by a wide variety of classic analog synths and so it is not limited to emulating only one specific synth. It’s flexible voice engine featuring a separate pannable mono synth for each voice allows to include or exclude any voice of choice which can make it a Matrix-12 like polyphonic monster synth, a classic 4-voice synth or even a simple innocent mono synth. The filter of OP-X PRO-II was inspired by the famous SEM (Synthesizer Expander Module) filter, but offers a bunch of extensions which make it way more flexible and capable of delivering a wide range of different sound characters.


OP-X PRO-II delivers the fattest and warmest strings, pads, brasses and leads that you’ve never heard before from a virtual synthesizer. It comes with more than 2,500 of the finest presets including the most famous 80s hits sounds and countless well-known presets from various classic vintage synths. In addition, you can download tons of highly elaborated sound banks from the regularly extended Sound Reloads area. 




  • 2 oscillators (saw, pulse, sine)
  • FM (Frequency Modulation), Hard Sync, Ring Mod, PW (Pulse Width) Modulation
  • Morphable multimode filter (LP12/24, HP, BP, no)
  • 2 LFOs (main, lever)
  • LFO 1 waveforms: sine, square, saw, triangle, sample&hold, sampled vibrato
  • LFO 1 features: delay, note trigger, free phase adjustment
  • 2 ADSRs (Filter, Amp)
  • ADSR 1: invertible, routable to pitch and pulse width
  • ADSR 2: switchable attack (lin/log), routable to ring mod
  • Stacked unisono with variable amount of voices and spread control
  • Switchable legato or retrigger (uni/poly)
  • Polyphonic portamento with switchable spread and detuning
  • Arpeggiator offering 32 modes
  • Chord hold, sequencer, double mode
  • Built-in effects processor (reverb/delay) offering presets
  • Switchable dual engine effects processing
  • LFO, effects and arpeggiator syncable to song tempo
  • 32 wheel modes, mod to cutoff, asymmetric bending
  • MIDI learn & relative or fetched CC (Control Change) processing
  • CC remote patch switching
  • Separate Voice Design (SVD)
  • Switchable master polyphony (6/8/12)
  • Deactivatable voices
  • Individual pan control per voice channel
  • Panning modulation
  • Global tuning options (OSC/FILT/ENV/POR)
  • Tuning trimpots per voice for custom tunings
  • Built-in patch browser with patch change smoother
  • 2,500 built-in presets



System Requirements

OP-X PRO-II is available for both the Windows and Mac platform in 32bit and 64bit format. The plugin formats cover VST2 and VST3 in Windows and AU and VST3 in Mac. 

  • Windows XP SP2 or higher
  • OSX 10.8 or higher
  • CPU: Core2Duo or higher
  • A 32bit or 64bit host supporting VST2, VST3 or AU




€85.00 EUR

(Limited Special Price)


* You can download a Demo Version with limited features for free: here. 



For more information on 'OP-X PRO-II'








About 'SonicProjects' (

SonicProjects provides top-notch digital emulations of old classic analog synthesizers. SonicProjects is a customer oriented plugin provider and wants to provide its users with the best tools possible. SonicProjects is a division of Bernhard Maechler Development and Research based in Bern, Switzerland.






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