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Synapse AF-4 Analog Filter

AF-4 Analog Filter

Synapse Audio

  • • Circuit-Modeled Filters
  • • Lowpass, Bandpass and Highpass modes
  • • Filter FM

Audio examples


The AF-4 is a virtual-analog lowpass filter module, based on the well-known transistor ladder design. In order to obtain highest quality, this lowpass filter employs a topology-preserving, zero-delay feedback network with 4x oversampling, yielding results comparable to industrial circuit simulator.

New in v1.1.0: Bandpass and Highpass modes.

New in v1.0.1: Sidechain for Filter FM.

Mac OS compatible Windows compatible