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New releaseWindows · Standalone + VST3Beast Plugins

AcidBeast

Bassline synthesizer

Squelch, slide, accent. Under pressure.

A modern acid bassline synth with a circuit-modelled voice, a squelching diode-ladder filter and a 64-step sequencer that slides, accents and ties like the real thing. Then it keeps going: song mode, an arpeggiator, 8 macros, a modulation matrix, a full effects rack and 12 skins.

$10$49Intro price
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Instant download · License key by email · One purchase, two computers

AcidBeast PLAY page in the Clear Acid skin: classic voice, scope, drive, motion, FX rack and the 16-step sequencer
  • 301Factory presets
  • 400Factory patterns
  • 64Sequencer steps
  • 3Circuits
  • 8Macros
  • 12Skins

Overview

A see-through acid lab.

The classic monophonic acid voice on top, the deep circuit extensions below, the sequencer at the bottom and the effects rack on the side, all on one page. Green acid runs through glass tubes into the reactor-core CUTOFF knob, and everything you need to write a line is in reach.

  1. 01SEQSequencer, arp or MIDI
  2. 02OSCSaw / square + sub
  3. 03VCFDiode-ladder filter
  4. 04VCAAccent + decay
  5. 05DRIVETwo stages, pre or post
  6. 06FXMod · delay · reverb
  7. 07MASTERFilter · comp · EQ · width

Preset previews

Hear the squelch.

Eight factory presets, straight out of the plugin: bass only, no drums, four bars at each preset's own tempo, rendered at ULTRA quality. Hit play and watch the scope.

  1. Robot Funk 96Signature · 8.7 s
  2. Beast ModeSignature · 7.0 s
  3. Silver BoxClassic Acid · 7.5 s
  4. Hip PocketAcid House · 7.9 s
  5. Bunker BurnerHard Techno Acid · 6.5 s
  6. Third Eye RollTrance & Psy Acid · 13.2 s
  7. Dub CellarDeep & Dub Acid · 8.1 s
  8. Golden Hour AcidSignature · 7.9 s

Classic core voice

Seven knobs. Endless squelch.

TUNING, CUTOFF, RESONANCE, ENV MOD, DECAY, ACCENT and VOLUME, exactly where your hands expect them. Underneath sits a circuit model: a saw core with its waveshaper droop, a square derived from the saw, and a nonlinear four-pole diode-ladder filter that, like the original, barely self-oscillates.

AcidBeast classic core voice: tuning, reactor-core cutoff knob, resonance, env mod, decay and accent
CIRCUITSwitch live · 10 ms glide
VINTAGE · An aged unit

Drifted capacitor tolerances and dried-out coupling capacitors: the slightly worn, slightly unpredictable box that has played a thousand parties.

  • Accent "wow": runs of accents stack the filter sweep higher, set by SWEEP SPEED
  • Slide with the stock glide, or anywhere from 10 to 500 ms
  • Every instance gets its own unit serial with its own component tolerances, saved with your project
  • ECO 2×, HQ 4× or ULTRA 8× oversampling; offline renders always run at ULTRA

Deep mods · circuit extensions

The mods the original never had.

Ten circuit extensions open up the parts of the voice that used to be fixed, from separate accent and normal decays to audio-rate filter FM and a sub oscillator.

  • ACCENT DECAY30–3000 ms
  • NORMAL DECAY16–4000 ms
  • SOFT ATTACK0.3–30 ms
  • SLIDE TIME10–500 ms
  • SWEEP SPEEDAccent build-up
  • FILTER FMAudio-rate
  • FILTER TRACKKey tracking
  • SUB OSC0 / −1 / −2 oct
  • DRIFTOscillator drift
  • MUFFLEROFF · SOFT · HARD
CALIBRATIONUnit trims on the MODS page
  • MASTER TUNE 430–450 Hz
  • VCF TRIM
  • RESO TRIM
  • GATE TRIM
  • LOW CUT
  • BASS BOOST 0–6 dB
  • TREBLE ±6 dB
  • CONDITION
  • NOISE
  • VCA CLICKS
  • CLIPPER
  • OUTPUT −24…+12 dB

Step sequencer

Sixty-four steps of trouble.

Up to 64 steps on four pages of 16. Every step has pitch, a NOTE / TIE / REST gate, accent, slide, octave, vibrato and its own cutoff lane, and tie, slide and rest behave like the original box.

STEP SEQUENCER16 OF 64 · FWD · HOST
  1. C2 1 NOTE
  2. C2 2 NOTE
  3. C3 3 NOTE
  4. C2 4 NOTE
  5. D#2 5 NOTE
  6. · 6 REST
  7. C2 7 NOTE
  8. G2 8 NOTE
  9. C2 9 NOTE
  10. A#1 10 NOTE
  11. C2 11 NOTE
  12. F2 12 NOTE
  13. C3 13 NOTE
  14. C3 14 TIE
  15. D#2 15 NOTE
  16. G2 16 NOTE

AccentSlideC minor · SW 50%

AcidBeast sequencer deck: transport, pattern bank, 16 lit steps with accent, slide, octave and vibrato lanes, step entry keyboard and GENERATE

Timing + direction

Eight rates from 1/32 to 1/4 including triplets and dotted, SWING 50–75 %, gate length and transpose ±24. Play FORWARD, REVERSE, PING-PONG, INVERT or RANDOM.

Sync three ways

HOST follows your DAW sample-accurately, loop points included. KEY starts and transposes the pattern from a MIDI key. FREE runs on its own clock.

Banks + song mode

128 pattern slots (A–H × 1–16), a pattern lock across preset changes, and SONG mode with up to 64 entries, repeats and transposes. MIDI notes 24–39 pick patterns 1–16.

Write it your way

Step-record from MIDI (velocity 100+ is an accent, overlapping notes slide) or use classic entry: a pitch pass, then a time pass. Accent, slide, octave and mod lanes can each run their own length.

Generate, mutate, evolve

Seeded RANDOMIZE with density, accent and slide amounts in 11 scales, MUTATE, and EVOLVE: the pattern drifts every 1–16 passes and is pulled back toward the one you stored.

Drag it out

DRAG MIDI straight into your DAW, DRAG AUDIO to render the pattern to a WAV, or IMPORT MIDI to bring a line in.

ARPOr play it from your keyboard

Switch from SEQ to NOTE (mono, last note wins, overlapping notes slide) or ARP: 12 orders, 1–4 octaves with four octave modes, its own rate, accent and slide modes, repeat and HOLD.

  • ORDER
  • UP
  • DOWN
  • UP-DOWN IN
  • UP-DOWN EX
  • RANDOM
  • REVERSE
  • CONVERGE
  • DIVERGE
  • PINKY UP
  • THUMB UP
  • RANDOM WALK
AcidBeast drive and motion panels: drive models, LFO shape and the SQUELCH, GRIT, SPACE and WOBBLE macros

Modulation + macros

One knob, eight targets.

Eight macros, each driving up to eight targets with its own curve (LINEAR, EXP, LOG or S-CURVE). MACRO 1–4 start as SQUELCH, GRIT, SPACE and WOBBLE, and pad pressure can drive them.

  • LFO 1 + 2: six shapes or draw your own 32-point shape, synced from 1/32 to 4 bars or free at 0.01–30 Hz
  • MOD ENV with a drawable shape, one-shot or looping
  • 8-slot matrix: 15 sources, 22 destinations, live meters and drag-to-assign
  • Ableton Push 3 ready: macros on encoder page 1, the classic knobs on page 2 (with Live on a computer)

Drive + effects rack

Finish the line inside the synth.

Two drives, three effects in any of six orders and a master strip. Every switch crossfades without clicks, and the mod effects keep the bass dry and mono below 180 Hz.

AcidBeast FX rack: MOD with chorus, phaser and flanger, ping-pong DELAY and REVERB
DRIVE 1 + 2

Two drive stages routed 1 → 2, 2 → 1 or in parallel, each PRE (inside the oversampled voice, before the filter) or POST, with DRIVE, TONE, MIX and auto-gain.

  • TUBE
  • DIODE
  • FUZZ
  • FOLD
  • CRUSH
MOD

Chorus, phaser or flanger with rate from 0.02 to 10 Hz, depth, mix and feedback.

  • CHORUS
  • PHASER
  • FLANGER
DELAY

12 synced times from 1/32 to 1/2 (3/16 included), feedback up to 0.95, tone and ping-pong.

  • DIGITAL
  • TAPE
  • PAN
REVERB

Size, damping, pre-delay up to 250 ms, decay, width, low cut, modulation and ducking.

  • ROOM
  • PLATE
  • HALL
  • SPRING
  • SHIMMER
  • DARK
MASTER

FILTER (LP, HP, BP or COMB), CRUSH, COMP (single or 3-band multiband, with mix), a 4-band EQ and WIDTH with MONO BASS.

  • FILTER
  • CRUSH
  • COMP
  • EQ
  • WIDTH
14 FX presets

Plus your own .acidfx files.

  • DUB ECHO
  • TAPE SPACE
  • WAREHOUSE VERB
  • SHIMMER WASH
  • TIGHT MASTER
  • CRUSHED
  • SQUASHED BUS
  • MONO CLUB
  • JET FLANGE
  • DARK PHASER

New release

The whole lab for $10.

Circuit-modelled voice, 64-step sequencer with song mode, 8 macros, a full FX rack, 12 skins, 301 presets and 400 patterns.

Learn more

Skins

Twelve skins. Pick your poison.

Five material families, from clear acrylic to smoked acrylic, frosted silver and stealth rubber, switched live. Or open the theme editor, set your own panel, accent, LED, neon and text colours (with a contrast warning) and share it as an .acidtheme file.

AcidBeast in the Clear Acid skin AcidBeast in the Smoked Obsidian skin AcidBeast in the Clear Ice skin AcidBeast in the Clear Magenta skin AcidBeast in the Toxic Slate skin AcidBeast in the Radioactive Orange skin AcidBeast in the Plasma Blue skin AcidBeast in the Classic Silver skin AcidBeast in the Stealth Toxic skin AcidBeast in the Stealth Amber skin AcidBeast in the Stealth Ice skin AcidBeast in the Hazmat Yellow skin
Clear Acid · Acrylic
  • Resizable from 50 to 200 %, sharp on HiDPI screens
  • BALANCED, FULL MOTION or REDUCED MOTION animation
  • Preset browser with search, tags, colour favourites, A/B compare and undo for every gesture

Factory content

301 presets. 400 patterns.

Every preset carries its own pattern bank (a main pattern and three variations) and is levelled to sit together, around −16 LUFS. All 400 patterns are written on a key, a mode and a real chord progression, so every strong beat lands on a chord tone.

Presets14 categories
  • CLASSIC ACIDSilver Box · Rubber Spine · Chrome Worm43
  • HARD TECHNO ACIDBunker Burner · Steel Pulse · Rivet Gun43
  • ACID HOUSEHip Pocket · Velvet Rope · Warehouse Pump38
  • ORGANIC HOUSE ACIDMoss Garden · Clay Pot · Driftwood37
  • ACID TECHNO & RAVEStrobe Children · Laser Fog · Rave Tax27
  • TRANCE & PSY ACIDThird Eye Roll · Glass Spiral · Mandala Rider22
  • ELECTRO & BREAKSPop Lock Circuit · Breakbeat Basement16
  • DEEP & DUB ACIDDub Cellar · Submarine Signal15
  • LEADS & FXSiren Song · Laser Tag · Squeal Machine14
  • PERFORMANCEPush Squelch · Eight Knob Rave · Dub Desk14
  • SONG STARTERSFirst Track · Peak Time Plan · Build And Drop13
  • MASTER FXPhone Line Acid · Comb Metal · Eight Bit Rave13
  • SIGNATURERobot Funk 96 · Blood Rave · Beast Mode5
  • INITA clean start1
Patterns16 / 32 / 64 steps
  • CLASSIC ACIDSticky Fizz · Greasy Gloop · Plastic Ooze56 / 30 / 14
  • HOUSE & TECHNOSilo Bop · Vapor Shimmy · Railway Jack50 / 40 / 10
  • TRANCE & PSYElectric Engine · Ultra Rush · Glass Motion30 / 25 / 45
  • BREAKS & ELECTROSonic Code · Street Code · Android Lock45 / 40 / 15
Notes
8,852
Accents
2,873
Slides
1,329
Keys
12

Specs & license

What you get.

Platform
Windows (64-bit)
Formats
Standalone application + VST3 instrument
Voice
Monophonic; saw / square with sub oscillator; diode-ladder filter; VINTAGE, CLEAN and BEAST circuits
Quality
ECO 2×, HQ 4× or ULTRA 8× oversampling
Sequencer
64 steps, 128-slot pattern bank, song mode with 64 entries, HOST / KEY / FREE sync
Play modes
SEQ, NOTE and ARP (12 orders, 1–4 octaves)
Modulation
2 LFOs, mod envelope, 8-slot matrix (15 sources, 22 destinations), 8 macros
Effects
Two drives (5 models), MOD, DELAY, REVERB (6 types), master filter, crush, comp, EQ and width
Content
301 presets in 14 categories, 400 patterns in 4 banks, 14 FX presets
Interface
12 skins + theme editor, 50–200 % scaling, MIDI learn, Push 3 macros
BEASTNETOne purchase. Two computers.
  1. BuyInstant digital download. Your ACB- license key arrives by email. One license per order.
  2. Sign inSign in with your BEAST account (the email you used at checkout) and claim the key. An internet connection is needed to activate.
  3. Play anywhereActivate on up to two computers. Activated paid licenses keep working offline.

A 7-day trial is built in for any verified BEAST account, once per account and computer.

$10$49
Learn more

FAQ

Good questions.

What exactly do I download?

The Windows installer for the AcidBeast standalone application and VST3 instrument, with all factory presets, patterns and skins. Your license key arrives by email straight after checkout.

Do I need a DAW?

No. The standalone app runs on its own with the sequencer on its internal clock. In a DAW, load the VST3 and let the sequencer follow your host tempo and loop points.

Is there a Mac version?

AcidBeast is for Windows (64-bit) at launch.

How many computers can I use it on?

Two. Sign in with your BEAST account on each computer; after activation a paid license keeps working offline.

Can I get my patterns into my DAW?

Yes. Drag a pattern out as MIDI, render it to audio with DRAG AUDIO, or import a MIDI file into the sequencer.

Does it work with Ableton Push 3?

Yes, with Ableton Live on a computer: the 8 macros sit on the first encoder page and the classic knobs on the second, and pad pressure can drive a macro. Push 3 in standalone mode cannot load third-party plugins.

Can I control it with my own MIDI gear?

Yes. MIDI learn handles absolute and relative encoders with min/max ranges, and comes with ready-made GENERIC and HARDWARE BASS BOX maps.

Release the acid.

One voice, 64 steps, 8 macros, 12 skins, 301 presets and 400 patterns.

Learn more

Introductory price $10 · regular price $49