Best free TB-303 emulation sotwares : VST plugins & standalone

Be Acid

Be Acid

The Roland TB-303 ! the legendary Transistor Bass synthesizer by Roland.
Created to emulate bass sound and used by nearly nobody until someone saw the light : “hey, listen what happens when i turn these knobs!!” turn up the res to the max ! yeah ! aciiiiiiiiiid
Back to the Chicago House, Acid House, Belgian New Beat, then Acid Techno, Acid Trance and every electronic music genre.


Now let list some free TB303 software emulations :

1. Rebirth RB-338 by Propellerhead (Standalone)

Rebirth RB-303, free ! aciid

Rebirth RB-303, free ! aciid

Information and download :

Rebirth was one of the first TB303 software emulation, in 1997!
And it’s free since 2005.
Rebirth is more than a TB303 emulator ; you have two TB303, and TR909 + TR808 drum machine emulations + onboard effects . The software is old, and it still sounds incredible.

As it’s a standalone application, you have to use rewire for sync with your sequencer. Useful informations about sync etc.. can be found here :

Installing Rebirth 338 on Windows 7 may require more steps, you have to download the old winhelp32 to get Rebirth work on Windows 7. Here’s a blog post with all the link you need :
The rebirth ISO torrent, the Win7 installer and the link to the win32help :


2. RubberDuck by D-Lusion (Standalone)

RubberDuck TB 303 emulation for funky people

RubberDuck TB 303 emulation for funky people

Download for free ! =>

This one is even older than Rebirth 338. The sequencer has been simplified, compared to a real 303, and it’s a great gain of time when programming patterns!
There are also onboard effects : a simple but effective delay, and a distorsion unit for getting this squelchy acid sound.
The RubberDuck software is MIDI sync’able, Of course you can record as wav the output of the synth.


3. Creakbox BadBoyz edition (VST)

Creakbox Bad Boys edition

Creakbox Bad Boys edition

download : Creakbox Bad Boys Edition

The Creakbox VST by Bioroid development was stopped and gone open source in 2004!
The “bad boys” edition adds an effect section with delay & multi distorsion unit  : analog drive, rectifier, bit reducer etc.. + different filter modes : hipass, bandpass, bandstop, 18 or24 dB / octave.
The sound is good, but unfortunately the sequencer has some bugs in many VST hosts

acid trance !


4. Venom VB-303 by Antto (VST)

Venom VB-303

Venom VB-303

More about and download here :

This one is the newest : it’s a VST plugin made with Synthedit. It sounds very good and should work nice in all 32 bits VST hosts.

Acid house!


5. FreeBee (workname Lush) standalone

FreeBee 303

FreeBee 303

Info and download : archive  dl

The Audiorealism bassline ancestor !
This standalone application sounds very good, you can record as wav

mellow acid !



6. survey : do you need a free Creakbox VST 64 bit port ?

Post your comment !



Aciiiiid :
Solar quest – Acid Air Raid

Acrid Abeyance – 303 Delight

Dr. Fernando! – Stomach Substance

Plank – Acid Wars

Hardfloor – Acperience 1

Unknown Structure – Helixcoid

27 thoughts on “Best free TB-303 emulation sotwares : VST plugins & standalone

    1. Wavosaur Post author

      You are the first to ask since the article was posted !
      I have already ported creakbox to 64 bit, but i wait for more love before releasing a version.
      Or maybe recode the sequencer, the current on is buggy as hell

    1. Wavosaur Post author

      i can’t remember if there’s a way to control the pattern order from the host.
      the source code is a mess
      i aldready have a 64 bit version working, but i’m going to add MIDI in

      1. Glenn

        Did you already succeeded to add MIDI in it? The soundsource is great, but it would be great that we could pass the internal sequencer.

  1. bsln

    not quite emulations…

    refx tbl bassline /claw;
    neotec cetone033 /cetonelight (filter);
    braindoc aggressor (filter);
    wwaym nwbass v1 /v2.

  2. VeganPete

    RubberDuck H30 (by d-lusion) is hands down the most creative 303 emulator. It has some of the best sounds as well, very dynamic and less rigid than all the others. I had bought ABL (which is great sounding and lovely to sequence!) but prefer RubberDuck for it’s creative freedom and the amazing sounds and rhythms you can get from it with zero effort. The only real issue with RubberDuck H30 is that it’s a standalone (not a VST) but map it to a MIDI controller and you can play it live and import it to a DAW.

    Here’s a track I made with it. This is my second attempt of using it in music (instead of just playing with it as a toy)….


  3. project_amateur

    NO VeganPete , RubberDuck H30 (by d-lusion) IS NOT the most creative 303 emulator, because it is the worst TB-303 emulator. In fact,it is not an emulator at all! It doesn’t even try to emulate a 303 or anything out there.
    and YES,It is the sickest and most creative ACID machine that has come to my attention over the years, and I mean THE sickest! I regard it as a rival to TB303 and RB338 or “Rebirth”, with a more “acidier” sound.(they actually eat its dust). And I really have been wondering so many years how come so many people have made so many emulators of the 303, after RD H3O! I mean RubberDuck should be a milestone in ACID emulators.Why no-one has ever come up with one -just ONE – RDH3O emulator all these years?
    If what people made with a 303 named it ACID, then the music made by RD H30 should be called something like TNT, or “greek fire” (google this to get what I’m sayin’ )
    Regards. I heared your track in YouTube and I liked it.

  4. RAW Acide

    Is there a VST3 TB303 Acid BassLine plugin out there ?
    I can’t find any, free or not
    we are in 2021, and WE WANT ACID
    come on


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