This site is focussed on the added new features. For general information on the OP-X
have a look at the OP-X site.
The multimode filter
The SEM based multimode filter offers two extreme positions: a 12/24dB switchable lowpass pole
(12dB mode same as OP-X) and a seamlessly (!) switchable multimode position (highpass, bandpass,
lowpass). A mix trimpot can blend from the lowpass pole to the multimode pole continuously.
If the multimode pole is in highpass mode the 12 o'clock mix results in notch filtering like
in the old SEM module. The lowpass-multimode mix can be automated by the main lfo and
the filter envelope. This gives you tremendous control over tone to make fit a sound the mix
without eqing at all. That's how it should be anyway.
The already great individual voice pans can now be modulated by the lfo for moving
The tuning trimpots of the original's voice cards have returned in the virtual world.
You can tune your OP-X PRO now like a service technician of the old days. This allows
you to copy a hardware synth in every detail and gives you total control over the
Lets you tune the filters of each voice.
Lets you tune the filter envelopes of each voice. This gives total control for
vintage sweeps and pads.
Lets you tune the portamento times of each voice. This gives total control over
the „smear“ effect of the old days.
An OB-8 feature is present now too.
Ocillators tune offset
In old voltage controlled analog synths a totally equal tuning between oscillator 1 and 2
was almoust impossible. There were always slow beats left. This trimpot lets you control
Oscillators fine tuning
Old monophonic synths like the ARP Odyssey offered continuous pitch control for fine
fm adjustments. In the OP-X PRO you can switch from quantized (semi tones or octaves)
to seamless pitch control.
Voice muting section
The voices can be muted individually for less fat unisono sounds, real mono mode and
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