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Synth (Analogue / Subtractive) Plugin by HERCs Music Systems
Abakos by HERCs Music Systems is a Virtual Instrument Audio Plugin for Windows. It functions as a VST Plugin.
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Abakos is a virtual analogue synth.


  • 2 VCO with 3 waveforms.
  • LFO with multiple waveforms.
  • 2 ADSR for sound design.
  • Envelope Follow.
  • Onboard Delay, Tremolo, Vibrato and Wah Wah.
  • Noise Generator.
  • Ring Mod.
  • Digital / Analogue Filter Modes.
  • Internal preset management system.

Latest User Reviews

Average user rating of 5.00 from 1 review

Reviewed By Polybius [all]
February 21st, 2008
Version reviewed: 2.1 on Windows

I've been having so much fun with this synth for such a long time now, it's starting to hurt to see that this gem hasn't received a proper and deserved review yet. So here it goes:


Seeing as the GUI of this synth was touched by the magical hand of Artvera, who's work you may also recognise from synths such as "Golden Asset", i can only give this synth a 10/10.
Crisp, clean graphics, and an original "abacus" inspired theme give you the immediate impression that a lot of love has gone into the creation of the GUI. Everything is readable, clear and everything fits on screen.


I stumbled upon this synth while i was still in the early stages of discovering VST's. At this time, all i did was wander from one synth to the other, giving all the “freebies” a quick go. Most of time you go trough some presets and say to yourself “delete, bring on the next!” and never look at it again. While going from synth to synth, this is one of those synths that make you yell “Hold the line! We've got something here!”.
When rummaging trough the presets, i immediately recognized some sounds that could have come straight from the hands of “Boards of Canada”. I'm a sucker for VA's, and this synth has an analogue sound quality i'd like to describe as “sweet” and “creamy”. Sorry if it doesn't make any sense.
When you are working with a synth, you are generally using it for 4 common purposes: leads, pads, FX and bass. I tought i'd be a good idea to give you a quick run-trough of each of these purposes:

PADS & LEADS: This is where this synth really shines! This has become my go-to synth when i'm in the early stages of writing a song, and i'm looking for a “main theme”. Partly because it's so simple to operate, but mainly because it seems like no matter what knob i turn, there's always something to like about the sounds i'm producing. Sweet, endless sweeping pads, penetrating leads that cut right trough the mix, Moog/theremin -like whistles, just twist the knobs and let the oscillators give you their love!

FX: I used to go to VST's that are specialized in fx, but are mainly “one hit wonders”, because all they do is FX. Thanks to the feature-rich LFO section of this synth, you can easily create warbling, fluttering, spacy effects ranging from tweeting birds to spaceships landing on a storm-plagued planet.

BASS: You can get some really crunchy, moogy basses out of this synth, but you'll need some boosting/EQ'ing to really get an appreciative bass sound out of this synth. There's synths out there that get you a great Bass sound “out of the box”, but usually you'll have to fork out some cash. To conclude, this synth will get the job done on the bass department, but you'll have to put some boost on it.

There's also a noise generator feature i'd like to say something about. Most synths seem to feature a noise generator as a quickly thrown in addon. But there's something about the noise generator on this synth that makes it stand out from the rest. There's this sweet hissy sound that's actually usefull, something that gives the sounds that are produced a real analog feel. This is the first synth that didn't make me leave the noise button untouched.


I suggest you look at the features on top of this page. I would call this a “bread & butter” type- synth, but the rich LFO -section, and other features such as key transpose, a usefull noise generator (not obvious on most synths), delay section, ringmod, digital/analog switch...make this synth rise above the “bread & butter” denominator.


Another 10! The documentation that is included in a nicely laid-out PDF document explains the features in great dept, but it also goes a little further. There's a really nice beginner-friendly synthesis introduction, with examples on how to use this synth to create certain sounds such as sea waves, heartbeats, strings... A very nice addition to complete this package, and a sign of great generosity!


10/10 without a doubt.
I didn't count them all, but there must be around 250 presets in this package, divided over 3 banks. When i first loaded up this synth, i must have spent an hour going trough the presets. I found most of them very usefull, and all of them are aptly labeled “FX” “PAD” KEYS” for further clarity.


Seeing as this is a free synth, i was pleasantly surprised to receive a same-day reply about the problems i was having with saving presets with songs.


It's free, nothing to see here, you owe it to yourself to download this synth now.


Using Renoise as a host, i've experienced no crashes yet. Easy on the CPU, steady between the 1-10% mark on an AMD64 4000+ with 2 gigs of ram.


This is truly one of those gems that suprise you it's free. You know, one of those synths that make people say “better than some commercial synths”.

So, what are you waiting for? Download this gem and put a smile on your face
Read Review

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Comments & Discussion for HERCs Music Systems Abakos

Discussion: Active
26 August 2013 at 6:19pm

Hey, person above! ^^ thanx a ton for your overview of what I hope will be a fun synth that is not too hard on my cpu. I like some complicated synths that allow you to truly modulate the sounds via envelopes, other waves, and etc., but I also love easy to use synths that actually have GOOD sounding (not too generic) pre-sets, because they really allow one to spend less time programming, and more time being a musician! So, thanks, I'm downloading this now for FL studio.

18 December 2013 at 4:24pm

Even now, after many years, Abakos still stands out. In my top 15 free synths.

28 September 2013 at 5:06pm

Extract from their page :

HERCs Music Systems has ceased all commercial operations. Our VST plugins will no longer be supported or sold. All formerly available freeware, Abakos and Alien Artifact, will remain available from this website for the foreseeable future and will remain as freeware.

Abakos Pro will not be available as either a commercial product or as freeware for the foreseeable future.

We thank all of you who supported us and purchased Abakos Pro

To download it is in that page, which has the URL :


8 January 2017 at 9:06pm

Abakos Pro in a new version is available as freeware at http://www.hercsmusicsystems.com/old_index.html

8 January 2017 at 10:16pm

404 Not found.

In fact the new page is here:


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