Flanger BL-20: Modulation Flanger Plugin by Arturia Free Download

At its core, Flanger BL-20 modulates a delayed copy of the signal. Its zero-crossing mode applies a small delay to the dry signal so the modulated copy passes over the original starting point. The result is a deep flange with pronounced blips in the sound, a effect often associated with 1980s guitar tones.

You can choose between Auto (LFO), Env and Manual modulation, or combine them. The Env source can follow the internal signal or an external envelope input, which lets one track drive the flanger on another. The LFO offers a triangle default plus sine, square, sawtooth and reverse sawtooth shapes, and it can sync to tempo.

Flanger BL-20 runs in mono or stereo mode. The Stereo Offset control changes the spread of the dry and wet signals, and a reverse sweep switch works alongside it for wider, swirling results. A 12 dB per octave high-pass filter on the input lets you moderate the zero-crossing sound and keep low end clearer.

The Function Generator, taken from Pigments, can override the Manual modulation source for a custom response. A set of 28 presets gives you starting points to audition before shaping sounds of your own.