Korg Prologue 8/16 Voice Analog Poly Synth


Yeah, this is what caught my attention as well. This looks like it could turn out to be very interesting, indeed. And the fact that the software will be open source is also quite appealing.


I look forward to seeing how well done the SDK is. (Being a hw/sw developer.) I hope the interface is a rich one! (OK Full out GAS attack here!)

Like for instance can you commandeer some of the controls – does the SDI go that deep? Or add new midi interface responses?

ADDED: And what about digital audio interfaces over USB? A lot to learn here – good the user manual is already available on-line.


Programmable Synth Engine, is really something new, cool idea.


That’s the most interesting thing about this synth. Apparently you can create your own oscillator programs with a software. I don’t know what will be possible, but if you can create some kind of functions that calculates a waveform this could be something real innovative.

But what the hell did they thought by implementing just one LFO! If the digital oscillator isn’t as spectacular as i imagine, i will buy a prophet 12 or a Rev 2 Desktop. Maybe it costs more, but you get 4 LFOs over 100 modulation destinations and some of the best analog sounds possible.


I think for the more adventurous synthesists - those not scared away by the single LFO - it’s the SDK that’s going make or break this synth, as well as the memory capacity (storage and RAM). Wavetable sounds great, but if it’s only 8 waves because of storage limitations that would kill enthusiasm.

Similarly, would the FX side of the SDK allow something interesting like granular stuff, or 8 simultaneous delay lines like the UD Stomp…


The question is, even if you listen to Techno, how often are those experimental sounds used?


I am remembering back Korg had the Oasys in like 2005 – which was an software expandable synth based on Linux. Maybe they’re bringing something like that back.

If the SDI also has some good control, to keep down the bugs, and maybe a debug system, and something to monitor performance, these kind of tools, that would help a lot. As i recall (vaguely) the Oasys was prone to bugs.

ADDED: And Korg also has their Kronos as heritage.

ADDED: Even the Korg Volca Sample has a SDK.


I like experimental sounds. I use them often - does not matter to me how often Big Pop Star uses it. This was done on an OP-1

In response to earlier comments, yes it does look priced to compete vs. Rev2, and also System 8. Some people seem to dislike the Curtis filter sound of the Rev2 - any Curtis filter is an instant non-starter for them (and they let everyone know about it). I can’t stand the System 8’s lighting scheme myself.


I was skeptical with the Minilogue having “only” one LFO. That said, I was one of the lucky few getting it in the first batch. Ima slut. Anyway, fret not about it having 1 LFO. The oscillator section on the Minilogue is powerful. The wave shaping, crossmod, ringmod, sync (and pitch EG) can all be used in whatever combinations you can come up with. I’ve made hundreds of patches on it. I’ll def take a synth with a proper powerful OSC section then say something like the DeepMind12 (which I also have, it’s horrible don’t buy one if you like tweaking knobs, it’s like Windows 98; sounds like a vacuum cleaner and is buggy af). This’ll be another huge hit for Korg. That compressor on the panel looks sweet, so many people will geek way out of control having that AND an oscilloscope on the panel. :slight_smile:


Korg Magic Eye Compressor Guage

Cute. Only on the 16 voice model.


The monologue is a nice synth, i am a bit interested in it has its own character, but is not so overwhelming. The question is how the extra osciallator section is controlled then. ? Not to obvious from the front panel?


It’s almost like a physical version of DeeMax (Gadget IAP)


Interesting to see other synths adopt the idea of self-patched presets like organelle, Nord g2 modular. The extent of limitations of what can be done with the RAM, the editor etc will be the making of it.


Ehh… looks nice enough and I’m absolutely sure someone more talented than me (not that hard) will do something fantastical with it I’m instantly jealous of, but yeah, no real GAS for this. I have a Minilogue and totally happy with it for what it is and the price. Prologue… I’m gonna pass.

I want an A4 MKII and a DeepMind 12 desktop until I see something significantly better than those in both function and overall value.


Prologue is a must buy with one caveat (Elektron do not release a new Analog Keys 8 or more voices)
If Elektron don’t its a green light for Korg, Korg will own the poly market for the near future.
But life is not black and white --Korg might be in for a shock on Jan 25th with competition.


If you need a hybrid with keys, save up for a Prophet 12 keys.
Incredible instrument.
Otherwise in a desktop, the Peak offers a lot more than this also.
For analog only, the Prophet rev2 is a much better option as well.
All of these have huge modulation possibilities, allowing much deeper sound design.
This thing isn’t cheap, and you really should be getting more for the money they are asking.


Me too - first thing that jumped out at me from the list of features.


One of the voices on the Prologue, there are eight or sixteen of these depending on the model.

Very similar to the Minilogue except for the addition of the Multi Engine, instead of the noise source.
So Ring-Mod and VCO1->VCO2 FM, and Osc Sync is the same and is included. The Multi Engine is not shown to have any control of the analog circuitry, but i am thinking (and hoping) it probably has some control not shown here, such as the tune-up and things like adjusting the FM Cross Mod and the VCO and VCF control, etc.

There has been some comment earlier on the need for more than one LFO and this seems reasonable given that this diagram shows you have to pick one destination for the LFO between the Oscillator, Wave Shaper and VCF. But also as said earlier, this is the same as the Minilogue, so if you don’t miss it there you won’t miss it here.

Regarding LFOs another thing should be considered as well, the User functions that run on the Multi Engine would allow you to put an LFO (or multiples) in software that would affect the output of the Multi Engine. And if someone is sneaky with their code, and my guess that the processor that runs the Multi Engine also control parts of the analog circuitry, than potentially other things could be done.

All this looks fun. (That a technical term.)


So as i said earlier i am hold off my judgement of the Prologue, until i hear more different demonstrations and uses.

But i just learned something that really tells me to hold off. These are still very early days in the implementation of the Multi Engine part that is built into every voice. (So up to 16 voices.) The manual says you can have up to 16 User Programs loaded for each Multi Engine, and switch between them. You of course can load down others and switch the ones you have on the Prologue, but that’s slower and you wouldn’t do it in a performance. The thing is, again according to the manual, that right now there is only ONE User Program and it is a demo! So there’s a lot still to happen here.

In addition the Multi Engine can be run as a VPM (Variable Phase Modulation) oscillator, which is new specifically with the Prologue. It’s kind of like FM in a way but lets you vary phase too (quickly i think), so there will be new sounds here. I don’t think this is entirely a new idea, but perhaps some of the implementation and wrinkles are new here. More on this in a moment.

Is the Prologue an analog synth, or a digital synth, or a hybrid? Its all three.


Doesn’t korg often use the term VPM to describe their FM synths? I’m guessing its just FM… Just how far into the edits one can get with the VPM remains to be seen though - or is there no editing of the VPM engine? You just select a preconfigured VPM ”patch” and that’s it?