Numerical Audio Released FD-1 Filter Delay, New Semi-Modular AUv3 Effect Processor For iOS

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Numerical Audio FD-1 is a new AUv3 effect plugin for iOS that is based on a semi-modular engine with dedicated filter, delay & modulation sections.

The engine is semi-modular and features two VA multi-mode to choose from (2 or 4 poles), a stereo delay with tempo sync and a wide range of modulation options. It features an analog-style step sequencer perfect for filter rhythms/grooves and an LFO for free running in tempo-synced to a host application.

Not only the effects make this app versatile but also its semi-modular design. It allows you to modulate every parameter of the engine inside the modulation matrix. So you can create not only delays/filter effects but also tape echos, complex stutter/repeats, chorus, flanger and more. A lovely new app from Numerical Audio.

Numerical Audio FD-1


  • VA multi-mode filter with 2 & 4
  • digital stereo delay with tempo sync and time range control
  • analog-style step sequencer
  • low-frequency oscillator (LFO)
  • easy-to-use mod matrix
  • input low-cut and drive controls
  • individual return levels for filter and delay
  • standalone, AUv3, IAA & AudioBus (filter)
  • MIDI tempo sync & CC control
  • iOS 11+, iPad 4th generation or newer.

Numerical Audio FD-1 is available now for $4.99 USD from the Apple App Store.

More information here: Numerical Audio

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