Designing Audio Effects Plugins in C++ 2nd Ed.

  • Chapter 13 Modulators: LFOs and Envelope Detectors

Block Diagram:


  • implements a 2nd order resonant modulated LPF using the MMA LPF2 algorithm
  • uses signal detection in dB and measures distances above threshold in dB


  • try changing the filter type to a BPF or a Reson filter for more of a wah-wah sound
  • add a HPF in the side-chain to prevent aggressive bass frequencies from triggering the filter accidentally – especially important for guitar effects



ASPiK: All ASPiK Projects Bundle

RackAFX7: All RAFX7 Projects Bundle

JUCE/iPlug: JUCE/iPlug Notes