OP-X Pro II is a virtual synthesizer based on the legendary Oberheim OB-X.

The OP-X Pro II is now the new flagship plug-in in the OPS series. It has many added features inspired by users of the original OP-X Pro plug-in. Just like it's older brothers, the OP-X Pro II feature separate signal paths for each of the 12 voices, with slight differences in sound - the oscillators, filters, envelopes and portamento times differ from voice to voice and can be tuned individually with global buttons. The separate paths were emulated from a 1979 OB-X hardware.

The OP-X Pro improves on the Oberheim's flexibility by having multiple modes. This idea was based off an old SEM multi-mode filter, this allows for seamless blending from low-pass over notch to high-pass with a fixed band-pass position. This is further improved on with a switchable 12/24dB low-pass position and a multi-mode pole. The LFO and the filter envelope can also automate the low-pass-to-multi-mode mix.

Further enhanced features:

• Detune voices with a number of Virtual tuning pots
• Adjustable legato mode
• Adjustable LFO to amp modulation.
• Improved envelope times.
• Voice LFO to pan modulation.
• Manage VCO frequencies
• Mute specific voices in variable mono mode.

OP-X / OP-X PRO feature separate signal paths for each of the six voices, with slight differences in sound - the oscillators, filters, envelopes and portamento times differ from voice to voice and can be tuned individually with four global buttons.

Standard OP-X Features:

• More detuning functionality
• Tuning options for: portamento times / filters / envelopes / oscillators
• Unisono or polyphonic portamento.
• X-mod, Sync, ring modulation, noise, s/h.
• Filter-envelope modulation.
• Sine wave frequency modulation.
• Arpeggiator/sequencer.
• Voice pans.
• Adjustable keyboard and lever animation

New in OP-X Pro II

• 1500 Presets
• 2 Oscillators
• morphable multimode filter
• 2 LFOs
• 2 ADSRs
• Chord functions
• 32 mode arpeggiator
• new built in effects like reverb and delay
• dual engine effects processing
• Sync arpeggiator, LFO and Effects to your preffered tempo
• 32 Wheel modes
• MIDI Learn

Here is a video showcasing the OP-X Pro II playing some 80's era songs:

Here is a video comparison of the OB-X and the OP-X Pro