Available for Windows 7, 8, 10, 11 Mac OS X, 11, 12.
Get the demos here.


Welcome to the AcidBox!

The AcidBox V2 is a bass line synthesizer, a recreation of the iconic 303 bass line synthesizer from the 80’s with a new interface, which makes it easier to create real-time sequences and tweak them in a live situation.

4 synchronize modes: host sync, internal sync, MIDI in, Arp

Up to 32 patterns

5 Distortion units.

1 Delay, with synced and ping pong mode.

A sequencer, with on-the-fly MIDI in record, to ease your sequencing.

Ability to export and import your sequences, patterns, and banks in multiple formats.

Get your live performances further with ACID BOX, a bass line synthesizer with custom functions, a 16 to 64 steps sequencer, and 6 integrated effects.
A simple tool for real-time creation.

Purchase it on the Audio Blast shop and get lifetime updates.

Available formats:

NKS, AAX, Audio Unit, VST3, VST2

Demo versions are available to try our products for:

Mac Os X, Mac Os 11, Mac 12, Windows 7, Windows 8, Windows 10, Windows 11

Get the demos here.

Get user’s manual here.

Watch more videos on our Youtube channel.

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Additional information

Operating system

Mac, Windows

Key Features

Key Features
• The “Acid” sound
• A powerful sequencer up to 64 steps
• 32 patterns
• Multiple ways to launch patterns: via MIDI programming and launch quantifications
• Easy pattern view
• 303 presets included (NEW)
• 4 sync modes:
Host sync

“ARP” mode, to use the plugin in arpeggiator mode:
You can play the sequence displayed with a MIDI keyboard, the sequence will stay synchronized to the tempo, and will be triggered by MIDI notes and transposed according to the pitch of the note triggered.

• 5 Distorsions
Hot Valve
Bit Crusher (NEW)
• 1 Intuitive delay, Ping Pong, and sync mode
• Create sequences on the fly for live situation
• Record on the fly, MIDI in external devices, external controllers
• Playing chords automatically arpeggiate the sequence
• MIDI OUT (sync with an external synth, or drag & drop the MIDI on clips in live situations)
• Random button now assignable (choose what you want to be randomized) (NEW)
• Realtime multiple random options: (NEW)
only accents, slides, notes, octaves, steps, fine tune, fine time, pan, params, all random
(see more on the specifications)
Resizable (4 sizes) 75 100 150 200 %
Dark mode (NEW)

• Fine tune parameters per step (NEW)
• Fine time parameters per step (NEW)
• Pan parameters per step (NEW)
• Audio react to pitch bend (previously was only used in pattern record mode to set slide)
• Adjustable pitch bend range (NEW)
• Use mouse wheel on knobs. (NEW)
• Step shift: to move your sequence to the left or the right
• Transpose: the entire sequence moves up or down
• Double click on knobs to reset to default value (CTRL/Command + Click still works too) (NEW)
• CTRL click to reset sliders to default values (les mini fine sliders) (NEW)
• Single clear for: note / octave / fine params / step / accents / slides (NEW)
• "Clear all patterns" added (NEW)
• transpose for MIDI Out (NEW)
• customizable value for accent threshold (when using MIDI In mode or when exporting MIDI / send MIDI Out) (NEW)
• stay in sync when bypass/not bypass (NEW)
• MIDI assign chart (NEW)
• better MIDI export (accents + slides) (NEW)
• drag n drop .303 files on the UI (NEW)
• Multiple import and export formats: .303, Phoscyon, ABL2, ABL3
• MORE BASS (Oscillators and filter updated) (NEW)
• Very easy to use!!
• Available formats:
VST2, VST3 (NEW), NKS (NEW), AAX (NEW), Audio Unit, Standalone
For ProTools users, our products are 64-BIT and compatible from Pro tools 11 and above

System requirements

MacOS 10.12, 10.13, 10.14, 10.15, 11, 12 (latest update), Intel Core i5 or equivalent CPU, 2 GB RAM
Windows 7, Windows 8 or Windows 10, Windows 11, Intel Core i5 or equivalent CPU, 2 GB RAM.
Requires an internet connection in order to install and update your products.