RP-1 Delay 4+

Dual Digital Delay

Kai Aras

    • 3.9 • 15 Ratings
    • $5.99



RP-1 - Dual Digital Delay FX

Two separate (stereo) delay lines allow for a wide range of effects ranging from basic slapback and ping-ping type echos to complex modulations and soundscapes.

* Overview
- Digital Stereo Delay with High- and Lowpass filters, Stereo spread and Looping
- Separate modulation Delay for Chorus, Vibrato, Flanger, Panning, Phaser & Tremolo effects
- Both sections can be bypassed individually
- Mod section can be routed pre or post delay
- Delay Times from 10ms to 2000ms (or 1/32 to 2bars)
- Tempo Sync via AudioUnit Host or Ableton Link
- Tap Temp and Manual Tempo
- Normal, Dotted and Triplet
- Stereo Spread
- Simple 1-Button Looping

* Connections
- AudioUnitV3 Effect
- Inter-App Audio Effect
- Audiobus (Filter)
- Ableton Link
- USB Audio Interface
- Microphone

What’s New

Version 1.4.3

Fixed an issue where the time control would not work properly when using tempo sync mode.

Ratings and Reviews

3.9 out of 5
15 Ratings

15 Ratings

lestercondee1989 ,

Problems with iOS 14

Please this app have problems with iOS 14. I can not save preset

transcendentalaccidentalism ,

Deep Stereo Delay & Delay Modulation

The Rotary slow panning preset sells this effect on its own - total spatial depth with a slight Doppler effect that’s unlike any other out there. There are undiscovered insanities in the app as well .. thinking the long dub delay effect.
Considering it does every modulation delay effect from flanging to chorus and vibrato, with the ability to create multiple instances of multiple effects through the AU feature, it’s well worth it.

For tape delay with all of the noise, flutter, and wow and ability to manually stop the reels in real-time, check out RE-1.

Musikman4Christ ,

IMHO- The Best Dual Digital Delay on IOS Period!

I was looking and looking, already had BBD, already have Analog Delay, already had Tape delay, I couldn’t believe I already owned this Digital delay! So glad I did because, it truly is one of the best! IMHO, the best I found in IOS and universal AU as well. I will be using this in my pedalboard with ToneX plugin dual amp setup on my iPhone and analog drives pedalboard.

I highly recommend this delay and supported by no other than one of the bet IOS developers!


App Privacy

The developer, Kai Aras, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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