The Arturia BL-20 Classic Flanger Plug-In takes the beloved studio classic and offers a fresh spin on its sound. With endless modulation possibilities and a jet-engine effect that packs a punch, it's the only flanger you'll ever need.

A Rare Gem
The Flanger BL-20's hardware predecessor may not be a household name, but its hypnotic sound and radical feature set speaks for itself. It's an unsung hero in the world of modulation effects – a rare gem that's renowned for its mysterious complexity.

Three Modulation Sources
Choose between Auto (LFO), Env (internal or external) or Manual, or any combination of the three, for an array of flanger sounds unlike anything you've ever heard.

Stereo Enhancer
Operate Flanger BL-20 in either mono or stereo mode, and manipulate the stereo spread of the modulated signal for ultra-wide presence in your mix.

Zero-Crossing
With Flanger BL-20's undetectable delay on the dry signal, the modulated signal passes over the original starting point, resulting in a classic deep flange with prominent 'blips' in the sound.

BBD Warmth
Flanger BL-20 uses authentic bucket-brigade device circuitry replication to emulate the original unit's gloriously warm analog response.

Advanced Controls
Change the Auto LFO shape, tweak the stereo spread – we even added an advanced function generator from Pigments. Vintage charm meets cutting-edge.

Presets
A curated selection of 28 presets give you instant access to the energetic movement and analog brilliance of Flanger BL-20.

Reaching Absolute Zero
The Flanger effect is achieved by modulating a delayed version of your signal using an LFO. Flanger BL-20 expands this principle in multiple directions. By applying an undetectable delay to the dry signal, the modulated signal is able to reach – and eventually pass over – the original starting point of the signal. This is known as 'zero-crossing' or 'through-zero' flanging, perfect for that dynamite '80s guitar sound.

Multiple Modulation Sources
The option of multiple modulation sources gives Flanger BL-20 a uniquely animated quality. Use the default LFO, a responsive envelope follower, or a static manual override – there's nothing quite like it.

Key Features

• Enhanced controls for an ultra-flexible stereo flanger
• Three modulation sources that can be combined: Auto (LFO), Env, and Manual
• Emulates the coveted warm sound of a BBD response
• Advanced features from Arturia that enhance the original unit
• Zero crossing effect for deeper and more prominent flanger sounds
• Stereo Offset and Reverse Sweep controls for manipulating stereo spread
• 12dB/oct Hi-pass filter on input signal
• Function Generator from Pigments can override Manual modulation mode
• Four additional Auto (LFO) modulation shapes to choose from
• Tempo sync rates for LFO and Function Generator
• External envelope option for extra-responsive modulation
• Mono and stereo plugin modes available
• Includes 28 curated presets for instant iconic modulation sounds.

Technical Specifications

Platforms Specifications
Windows
Win 10+ (64bit)
4 GB RAM
4 cores CPU, 3.4 GHz (4.0 GHz Turbo-boost)
1GB free hard disk space
OpenGL 2.0 compatible GPU
ARM processors not supported on Windows

Required configuration
VST, AAX, Audio Unit, NKS (64-bit DAWs only).

Apple
Mac OS 11+
4 GB RAM
4 cores CPU, 3.4 GHz (4.0 GHz Turbo-boost) or Apple Silicon CPU
1GB free hard disk space
OpenGL 2.0 compatible GPU

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