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Numerical Audio releases RP-1 Dual Delay for Mac OS X and Windows (AU, VST) with Intro Offer

Numerical Audio

Numerical Audio has released RP-1 - Dual Digital Delay for Mac OS X and Windows, bringing their popular iOS delay to the desktop.

RP-1 combines a traditional time delay with an additional modulation delay providing a wide range of effect combinations ranging from simple slapback echos to ping pong delays, heavily modulated delays and more.


  • Time delay section with delay times from 10ms to 2000ms.
  • Mod delay section with Chorus, Vibrato, Flanger, Pan, Tremolo and Phaser mode.
  • Flexible routing (Mod Delay can be set pre/post or bypassed completely).
  • Input section with High- and Lowpass filters (pre effect).
  • Stereo spread control and full stereo operation throughout.
  • Tempo Sync (Normal, Dotted, Triplet modes).


  • Mac OS X: Audio Unit or VST compatible plugin host.
  • Windows: VST compatible plugin host (32-bit/64-bit).

Pricing and Availability

RP-1 (Mac and Windows, AU, VST) is available now for $5 (intro offer, save 84% until Aug. 10th) and regularly sells for $30.

A fully functional but time limited demo is available from numericalaudio.com/rp1



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