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DirtBag by Istvan Kaldor is a Virtual Instrument and a Virtual Effect Audio Plugin for Windows. It functions as a VST Plugin.
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104 KVR members have added DirtBag to 10 My KVR groups 113 times.
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+10 in private groups

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Overall: 4251   4029

30-Day: 3631; 7-Day: 13986; Yesterday: 10426

  • 9 Drawbars (responds to cc20-cc29).
  • PW: pulse width (when pulse waveform selected).
  • Det: Detune.
  • Dirt: Distortion/Overdrive (the heart of DirtBag).
  • Cut: Cutoff (LPF) after distortion.
  • Sine/.../... the waveform.
  • Rota: Leslie amount.
  • Width: Leslie spread.
  • Slow/Fast/Acc: Leslie Slow/Fast/Acceleration controls.
  • cc01/cc04/PBnd: Leslie Slow/Fast switch could be mapped to Modwheel, Footswitch or Pitchbend.
  • Cut1/Cut2/LPF/Res: tone-tweakers.
  • Perc/Dec/2nd/3rd...: percussion controls.
  • Mix/Mod/Fback: Delay controls.
  • Lim: Clipper (hard clip).
  • Vol: Volume (cc07).
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Latest User Reviews

Average user rating of 4.20 from 5 reviews

Reviewed By duncanparsons
May 30th, 2003

Having tried things like morphiza and ZR3 (B4 is out of my reach!) I wondered what this would be like... Actually - very impressed!

It has the grunt and growl that you need for those Thijs Van Leer/Sylvia impressions! I really like it, and it has pride of place in my 'favs'.

the presets are good - nice variety demonstarting what can be done with the plug.

wrt stability of sound.. depending on how you look at it, either variable or excellent: it doesn't crash, but there is the 'randomness' of an overdriven hammond with grit on the teeth - and I like it that way.

It does clean sounds too, but the dirty is where it excels, the distortoin unit is well honed.

If you need an organ, you could do far worse then this..
Start saving those pennies!!
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Reviewed By warbug
February 6th, 2003

i absolutly love the sound of this organ, dirty grimey and yet tastey.

the gui is pretty self expalanitory, if youever used an organ type plugin

the sound is good is youlike trashey sounding organs

i was able to squeeze some unorgan like sounds out of it

very little docs

the presets are good you can start using this synth is songs right away in songs.

never delt with customer supprt but the creators seems like a nice guy form his posts.

a very good value for the money ...FREE!!!

the stability has vastly improved since the first release; no you can actually play chords!!

if you enjoy Organs do not pass this one by.
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Reviewed By mistertoast
January 22nd, 2003

I live in a small house, and about a year ago we ditched our big old organ for lack of space. I don't miss the old beast much anymore, thanks to Dirtbag. I love the sounds I can get--even some I can't get out of an organ.

There are lots of great organ plug-ins now. I'm not going to pick a favorite, but I have no complaints about this one. Top-notch on the customer service--the author bug-fixed and added features right before our eyes here on KvR.
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Reviewed By AndreasE
January 13th, 2003

Only the second review for such a good FREE instrument?

This thing is really sounding like the 60´s organs (Keith Emmerson and the Nice, Gary Brooker and Procol Harum, Deep Purple, Doors, Steppenwolf, ...) - phantastic and the presets are nice.

Customer support is outstanding because within two days there were three new versions with fixed bugs and some new features.

I´m very impressed of that instrument except for the somewhat high CPU consumption (but it´s a SE synth).
The absence of a documentation isn´t a problem, I think, because that organ isn´t really difficult to program.
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Reviewed By pough
January 7th, 2003

There are a few technical glitches (unless, of course, they're features) but otherwise this little VST grabbed me by the balls and made me squeal in pleasure. The sounds are full, raw and sexy.

To put it in totally untechnical terms, if B4 is a $200 meal and some restaurant that would NEVER let me in, Dirtbag is a delicious breakfast served with love to a starving person. I have no idea what that means, other than I'm hungry right now.

There seems to be a little feedback loop happening on some of the presets, but I imagine it can be fixed easily enough... unless it's meant to be there. This is the Dirtbag, after all. Cleanliness is next to uselessness, maybe.

Worth a try. Some fantabulous sounds come out of this thing, in my opinion. And I also own B4...

A few notes on my ratings... some of them are low because this thing is free (no docs that I've seen... maybe I should look harder), I haven't received a response yet about the glitch thing (haven't been waiting long, mind you) and there aren't too many presets... but it doesn't need very many. This thing is not making an attempt to be all things to all men.

UPDATE: problems have been fixed and new features added! The only thing lacking now is docs, but he has most of the main features listed on his website.
Read Review

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Comments & Discussion for Istvan Kaldor DirtBag

Discussion: Active
6 August 2012 at 9:23pm

Would love to try downloading it. But I press the link and there is a problem with the page


22 August 2013 at 6:12pm

All his VST collection (17 free VST's, some are real gems) is now available as a unique pack (.zip) here:


or here :


The second link is by far more interesting (when you're in... click on the link "Parent Directory" at the top of the page and you'll understand why it is more interesting...).

Let me add that if you like flutes... his VST named PanFlute is an awesome physical modelisation of flutes! (and not only the pan flute). Wonderful.

5 December 2017 at 6:06am

Hey, .

I downloaded Dirtbag and like the patches but I must be doing something wrong because it's the only VST in my fruityloop that distorts. I then ran the patches thru my keybaord amp and still get distortion. I'm new to VST and most others I've used pretty much played right out of the box, so not sure if I have to modify certain options. Any help is appreciated.

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