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OP-X PRO-II has an average user rating of 5.00 from 5 reviews

Rate & Review OP-X PRO-II

User Reviews by KVR Members for OP-X PRO-II

Reviewed By aaron aardvark [read all by] on May 17th, 2023
Version reviewed: 1.3 on Mac.
Last edited by aaron aardvark on 17th May 2023.

I own several Oberheim emulation synth plugins, and this one sounds the best to my ears overall, if you want that Oberheim sound. Lots of great factory patches. Check it out! The patch & memory management system could be better, but that's a small price to pay for that sound.

aaron aardvark.


Reviewed By loungedumore [read all by] on September 20th, 2022
Version reviewed: 1.2.6 on Mac

Amazing Emulation. Sounds fantastic and despite a bad wrap is quite easy to use. If you're after the OBX sound check it out .

Reviewed By OinkQuack [read all by] on May 29th, 2022
Version reviewed: 1.2.6 on Windows

Sonic Project's OP-X PRO-II 1.2.6 64-bit is the best and most authentic sounding Oberheim emulator I have ever heard. Their website information describes how much expertise, detail, precision and love went into developing this virtual instrument.

Reviewed By ajdz [read all by] on November 12th, 2021
Version reviewed: 1.2.6 on Mac.
Last edited by ajdz on 12th November 2021.

This is simply an awesome sounding synth. It's obivously an Oberheim OB-X emulation from the looks, but this thing really can emulate the typical classic sounds of all kinds of iconic synths of this era including Jupiter-8 and Prophet-5. Especially the Jupiter-8 factory presets the synth ships with sound closer to the real thing than anything else I've heard so far. The synth furthermore comes with absolutely tons of included soundbanks which really all are absolutely outstanding.

The synth offers a nearly endless number of features including voice based detuning, dozens of arpeggiator presets, FM, ring modulator, effects, automated voice panning, step-sequencer and so on. This on one hand is great of course, but if you want to program your own sounds from scratch the plentora of features also becomes a disadvantage somehow since a lot of stuff isn't really obvious and often isn't laid out logically which makes reading the manual a must and therefore can be cubersome. There's really a steep learning curve and I hope they one day provide something like a video tutorial.

Luckily the provided soundbanks are as good and there are as many sounds that you don't necessarily need to program your own sounds. If I do then I almost never start from scratch but just edit an existing preset which already sounds alike which saves me a lot of work.

I initially also wasn't happy with the interface which was too small and hard to read. But then they luckily released bigger interfaces and also an alternative interface without keyboard and unnecessary stuff which is my favourite. Especially the largest version of this interface, the Rack Edition Huge, really is like day and night compared to the original interface with huge sharp controls and big sharp text. Still a bit complicated but a lot better than the original one.

Another positive point to mention is that this synth is very light on CPU for a virtual analog having such a great sound. I'm able to use more than 10 instances in a one session on my medicore computer which is really great.

So all in all I really can highly recommend this synth.

Reviewed By manytalnts [read all by] on October 21st, 2021
Version reviewed: 1.2.6 on Windows

If you want the closest thing to having the actual OB-X keyboard this is the plugin to get. I bought this in 2015 and it is still by far the best plugin for this style of keyboard I have yet to use. I own this and there are other good ones out there (that I also own) but if you want the best, this is it.

User Reviews of older versions

Reviewed By dinaiz [read all by] on October 31st, 2011
Version reviewed: PRO-II on Windows.
Last edited by dinaiz on 1st November 2011.
OK I might be a little bit subjective here, let me explain :

I realised quite recently that the OB-X synth (the real machine, not the VST) had the sound I've been looking for in the last 15 years. No kidding. Since I've started making music as a kid, I wanted THAT sound but I had no idea where to find it.

Of course buying an OB-X wasn't an option so I looked for a similar VST. That's when I found this little gem !

I've tried MANY a VST synth in my life : all the native instruments, alchemy, sylenth-1, minimogue, ableton's operator and a lot of freewares. I really found them good, until I listened to that one.

They claim it has an analog sound which I found hard to believe given that everybody pretends to sound analog nowadays. To me it's the only one that sounds analog (the free minimogue is a close match though, but it's a different kind of sound, so they complete each other pretty well). Honestly this one has this "thing" which makes it sound like a real machine.

So yeah, I'm a bit subjective because I discover the OB-X (the real synth) and OP-X (this plugin) at the same time, and got really excited, however I can say to things :
- it's defintely a faithful emulation, and if you can hear the difference withthe real thing, then you definitely have superior ears than mine
- it's the most analog sounding VST I ever heard

Another thing to consider also is that I'm not into tweaking or designing sounds. I'm more into writing music. So to me presets are just as important as the capabilities of the instrument. That's another area where OP-X shines ! There are 1500 presets, and most of them sound just excelent. You have also a lot of presets from famous songs and artists (pink floyd, toto, etc ...) which are surprisingly similar if not identical.

So in a word, this VST sounds amazing right out of the box.

The only thing is that the interface looks really cluttered and that's a bit annoying. Besides, you will probably have to read the manual, if you want to make the most of it (adding efects, controling the detuning of the voices and so on ...)

Yet it does have the best sound I ever heard and to me that's the most important thing.

If you are after this kind of sound, try the demo. If you aren't ...well try it too, you might fall in love ;)
Reviewed By codevyper [read all by] on August 17th, 2010
Version reviewed: 1.2 on Windows
I bought this VST several months ago because I needed that fat Oberheim sound for some songs my band does live.

This is a good Oberheim incarnation and has all the bells and whistles that came on the original hardware version, plus a few extra. The sound is big and fat just like the Obies of the day. I can do a fairly direct comparison because I still own a Matrix 1000 and have it in my studio so I can hear the differences. The differences are there, but there not so much that this synth can't be considered a fairly faithful recreation from the sound standpoint.

The added capabilities of being able to pan and tune each oscillator individually is really nice. Where this VST lacks though is in the area of Midi implementation and EFX.

Virtually every other "decent" VST out there usually has a built-in chorus, delay or reverb somewhere. For me this is very helpful since I can store the appropriate effect with each patch. The OPX-PRO does not have any onboard EFX. While it sounds big, all the older analog synths benefited from EFX added to the patch and the Obie is no exception. I have to chain in outboard VT EFX to get the sound I need from the Obie and have to program separate patches on those EFX so that they load when I change the patch on the OPX. At $149.00 it could have it's own onboard EFX I think.

Also, no midi learn capabilities so you have to handle controller mapping in the host or on the controller board itself. If you're fine with that then this isn't a huge deal and that is in fact how I'm dealing with it myself. I've just gotten spoiled over the years with the midi learn capabilities of a lot of other commercial VSTs.

In the end, this isn't a bad VST and it sounds great and pretty darn authentic. I would highly recommend downloading the demo version and playing with it a bit to see if it suits your needs.

Latest 5 reviews from a total of 5

Comments & Discussion for SonicProjects OP-X PRO-II

Discussion: Active
1 March 2021 at 9:48am

Hi I made this video on how to use the OP-X PRO-II arpeggiator (in my opinion) one of the best features of this monster synth.


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