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 RF-1 by Numerical Audio is a Virtual Effect Audio Plugin and a Mobile Audio App and a Standalone Application for macOS, Windows and iOS. It functions as a VST Plugin, an Audio Units Plugin and a Standalone Application.
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Product RF-1
Developer Numerical Audio
Price (MSRP)
$29.00 (AU / VST) - $5.99 (iOS)
Type / Tags Reverb
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
  Download Released
System Requirements
- Windows 7+
- VST compatible plugin host (32-bit or 64-bit)
  Download Released
System Requirements
Mac OS X 10.9+
  Download Released
System Requirements
iOS 9+

RF-1 - Algorithmic Reverb (VST, AU, AB, IAA, Standalone)

RF-1 is a collection of algorithmic reverbs capable of creating a wide range of effects ranging from small rooms to huge spaces and everything in between.

* 5 unique reverb programs (see below)
* Space section with individual controls for Size, Decay, Predelay, Width & Damping
* Color section with high and low shelving filters, variable crossover, modulation frequency & amount
* True Stereo Processing
* Standalone operation with Mic/Guitar Input or USB Audio
* AudioUnit Extension allows multiple instances to be loaded within any given host
* Inter-App Audio and Audiobus support.
* Universal Application.


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

RF-1 is available for iOS (AU, IAA, AB, USB, Standalone) Mac OS X (AU, VST) and Microsoft Windows (VST 32-bit/64-bit).

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