Flanger BL-20

Modulation
Arturia

The Flanger BL-20 is a stereo flanger plug-in emulating a legendary English vintage bucket-brigade delay-based flanger unit from the late 1970s, renowned among world-class studios and artists. It combines classic warm analog tone with three independent modulation sources (LFO, manual control, and envelope follower) plus advanced features like a function generator, hi-pass filter, and stereo offset control for creative depth beyond the original hardware.

Available for:VSTVST3AUAAX

Key Features

  • Three modulation sources: LFO, Manual/Function Generator, and Envelope Follower
  • Bucket-Brigade Delay (BBD) circuits with dual independent delay lines for true stereo output
  • Multiple LFO waveforms via Auto Shape selector in Advanced panel
  • Function Generator with breakpoint editing and random generation for complex modulation
  • Zero Crossing Mode for subtractive flanging and enhanced comb filtering
  • Reverse Sweep control for stereo panning effects and stereo image shifting
  • 12dB/oct Hi-Pass Filter to preserve low-end clarity during processing
  • Stereo Offset (stereo width) control and envelope follower with threshold/decay

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