Numerical Audio Intros RF-1 Algorithmic Reverb For iOS


Numerical Audio has introduced RF-1, an algorithmic reverb for iOS.

RF-1 is a collection of algorithmic reverbs, capable of creating a variety of effects, ranging from small rooms to huge, heavily modulated spaces. The iOS reverb integrates with everything from AudioUnit Hosts over Audiobus to Inter-App Audio, Guitar- and USB Interfaces.

Here’s a video intro:


  • 5 unique reverb programs (see below)
  • Continuously variable size
  • Variable pre-delay
  • Diffusion control
  • Damping control
  • Width control
  • High- and Low shelves (+/- 6db pre effect)
  • Mod section with depth and speed controls (Sine LFO 0.01hz to 5.0hz)


  • Hall  – Clean and bright sounding space with subtile modulation and gradually building density.
  • Plate – Dark, highly diffused sound with high initial echo density and dark modulation.
  • EnsembleVerb – Capable of huge, wide spaces with deep modulation.
  • TremoloVerb – Large, bright and always moving with amplitude modulation at the output.
  • VintageVerb – Dark, noisy reverb, modeled after the first digital reverbs from the late 70s. (10khz bandwidth / 12bit processing)


  • AudioUnitV3 Effect
  • Inter-App Audio Effect
  • Audiobus (Filter)
  • Ableton Link
  • USB Audio Interface (Standalone)
  • Guitar Interface (Standalone)
  • Microphone (Standalone)

Pricing and Availability:

RF-1 Algorithmic Reverb for iOS is available now for US $5.99 in the App Store.

If you’ve used RF-1, leave a comment and let us know what you think of it!

2 thoughts on “Numerical Audio Intros RF-1 Algorithmic Reverb For iOS

  1. Does anyone else have issues with AB and IAA? Mine crashes every time on ios 10 iphone 5s on all buffer settings. Just want to clarify if I bought something my phone can’t handle…

  2. IAA not working correctly on my 5S. OK on my iPad. I have notified the dev. Must be a bug because the beta was working on my phone.

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