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Top 5 Acid Plugins – The Best Software TB-303 Clones

With Sabretooth

JUNE 14, 2026

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As a producer, the sound of the 303 has always been an integral part of my sound. I first got into electronic music at underground clubnights in Sheffield like Headcharge and Planet Zogg. I was hearing those DJs play early Stay for Forever acid techno, and some early acid trance and psychedelic trance. The sound of the 303 was rapidly imprinted into my very psyche.

When I started producing (in Logic 4!), with no means to purchase a real 303, I had to make do. The free Muon Tau was the best I found in terms of emulation in those days - which was ok but had no accent. I remember purchasing the AudioRealism Bass Line (ABL) in the mid 2000s and running it in Logic (6 I think) - I almost cried! The authentic sound of the 303 in my DAW. And I could duplicate it as many times as my laptop could handle it!

Before we get into the top 5, here is my potted history of the 303:

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“That squelching, bubbling, acidic tone became the foundation of acid house. The sound stuck. From there it spread fast - into rave, techno, trance, drum’n’bass, electro. The 303 became one of the most influential instruments of the 20th century, largely by accident.”

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History of the Roland TB-303

The Roland TB-303 Bass Line was released in 1981. Roland made it to solve a specific problem: bass players were expensive and hard to book. The idea was that guitarists could program the 303 to handle the bass parts, plug it in alongside a drum machine, and rehearse without needing another person in the room. It didn't work. The sequencer was notoriously difficult to program - a baffling combination of buttons, LEDs, and a workflow that bore little resemblance to how music actually works. It sounded thin and synthetic, nothing like a real bass. Musicians didn't want it. Roland discontinued it in 1984 after selling fewer than 10,000 units. The unsold stock ended up in second-hand shops across Japan and the US, clearing for as little as $50.

By the mid-80s, producers in Chicago had started picking them up. Not to replicate bass guitar - but to twist the pitch and filter controls until something else came out entirely. Turned up loud, with the cutoff swept and the resonance cranked, the 303 stopped sounding like a bad bass guitar and started sounding like nothing else on earth. That squelching, bubbling, acidic tone became the foundation of acid house. The sound stuck. From there it spread fast - into rave, techno, trance, drum’n’bass, electro. The 303 became one of the most influential instruments of the 20th century, largely by accident.

Emulation: the best software VST and Audio Unit 303s

Software emulation started early. ReBirth from Propellerhead, released in 1997, was one of the first serious attempts - two 303s and a couple of 909 drum machines in a single piece of software. It was eventually discontinued but remained available as a free download for years.

For a lot of producers, ReBirth was the first time the acid sound became truly accessible. Suddenly, anyone with a computer could start experimenting with 303 patterns and classic drum machine sounds. As software synthesis evolved through the 2000s, developers pushed further toward authenticity while also adding conveniences the original hardware never had - visual sequencers, automation, effects, patch recall and unlimited instances.

Today, software 303 emulation is better than ever. These are my top 5

My top 5 software TB-303 clones

Photo of DPVCO By Radical Frequencies synthesizer module

1. AudioRealism Bass Line (ABL3)

By AudioRealism

Best Overall

1. AudioRealism Bass Line (ABL) came along in the mid-2000s and became a go-to for producers who needed a 303 in the box. It modelled the circuit behaviour in detail and got close enough to fool people on a mix. ABL3 is the current version and it's still widely used.

The ABL is my go-to acid emulation synth. Simple to use, distinctly harsh and metallic.

Believe it or not, my go-to processing is incredibly simple:

ABL (resonance and accent on full, of course!)

EQ with a low-cut around 150Hz

Bitcrusher on full (I love Logic’s stock Bitcrusher)

Second EQ with a low-cut around 150Hz (the low-end gets reboosted by the distortion) - additional EQ to taste

Delay to taste

Reverb to taste

That is the classic uber-distorted signature Sabretooth 303 sound, and a majority of the samples in the ACIIID - 303 Sample Pack were made like this.

Check Out AudioRealism Bassline (ABL3)

2. Phoscyon 2

By D16

Most Authentic

Phoscyon by D16 Group is another well-regarded option - it goes deeper on the step sequencer and has a reputation for sounding authentic. D16 also made Phoscyon 2, which updated the interface considerably.

The Phoscyon 2 is my second go-to 303 emulation synth. I find it is better for softer, bubblier acid sounds - and I particularly love adding a little envelope on the accent attack and bringing the accent itself down a little. Enhances the squelchiness even further!

My processing tends to be:

ABL (resonance and accent on full, of course!)

EQ with a low-cut around 150Hz

Overdrive type distortion on 80-100% (I love Logic’s stock Overdrive)

Sometimes a second distortion unit (shout out to the fedDSP Phaturator which lets you stack and blend 6 different distortion types!)

Second EQ with a low-cut around 150Hz (the low-end gets reboosted by the distortion) - additional EQ to taste

Delay to taste

Reverb to taste

The softer, more old school sounding samples in my ACIIID - 303 Sample Pack were made like this.

Check Out D16 - Phoscyon 2

3. TB-303 Software Bass Line

By Roland

Official Emulation

TB-303 Software Bass Line by Roland themselves eventually entered the software space too. It uses their Analog Circuit Behavior modelling to recreate the original. It adds things the hardware never had - a proper visual pattern editor, 64 patterns per bank, randomisation functions, onboard effects, and a "Vintage Condition" knob that ages the virtual circuit. It's Roland's most complete take on their own instrument and pairs with the TB-03 hardware for hands-on control if you want it.

I don’t use it personally, but it is well regarded and accurate.

Check Out Roland - TB-303 Software Bass Line

4. Sylenth

By Lennard Digital

Best for Goa & Psy Acid

Sylenth, by Lennard Digital, doesn’t offer strict 303 emulation per se. However, I’m big fan of using a simple sawtooth waveform through a highly resonant bandpass filter: the results are incredibly acidic, if not strictly acid. I love using that for more melodic, Goa-inspired patterns. I tend to use Sylenth’s in-built distortion for those.

The melodic, less 303-by-the-book samples in my ACIIID - 303 Sample Pack were made this way.

Check Out Lennard Digital - Sylenth

5. Serum 2

By Xfer Records

Acid Without Limits

Serum 2 by Xfer Records. The big new addition from Serum for 303 work is the dedicated Acid Filter - it's designed specifically for 303-style acid lines and handles resonant sweeps much better than the original Serum's filter options.

Start with the Analog Acid wavetable on a saw wave, crank resonance on the Acid Filter, then shape the character almost entirely through filter envelope amount and decay - that ratio is where the 303 sound lives. Add a touch of soft-clip distortion in the FX chain.

If accuracy matters, ABL3 and Phoscyon 2 still win. But for psytrance where you want 303-adjacent with more movement and grit, Serum 2 is genuinely good now.

I used Serum 2 for a few Josh Wink style straight staccato acid lines in my ACIIID - 303 Sample Pack

Check Out Xfer Records - Serum 2

Conclusion

The honest take on software emulation is that it's come a long way. Early plugins didn't quite capture the instability and character of the analogue circuit - the way the filter behaves when it's pushed hard, the subtle tuning drift. Modern emulations are much more convincing, but there's still a camp that maintains you can hear the difference on a good system.

Sabretooth

BMSS Records - UK

With over 20 years of production behind him, Ben Fraser (AKA Sabretooth) is known for music defined by drive, momentum, and a rare ability to ignite the dancefloor.

His distinctive blend of twisted acidic, tech-infused psytrance has been released on his home label BMSS Records as well as leading labels including Iono, United Beats, Digital Om, Dacru, Blue Tunes, 24/7, Expo and Maharetta. Spanning everything from deep daytime prog-leaning grooves to fast, effervescent blasters, Sabretooth has built a reputation at underground parties and festivals worldwide.

Ben also releases acid techno and trance under his real name, with releases on Stay Up Forever and Hydraulix, while exploring punk through Creeping Tide and a warped fusion of punk and offbeat psy as Future Outbreak.

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