# PolyDelay — Polyrhythmic Delay AudioUnit

> Polyrhythmic delay audio effect plugin for music production. (iPhone/iPad app by Rob Jackson.)

- Source: https://appshunter.io/ios/app/polydelay/id6751120958 (this page in markdown: same URL + `.md`)
- Developer: [Rob Jackson](https://appshunter.io/developer/1072346998)
- Category: Music, Entertainment
- Price: $1.99
- Rating: 5.00/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 13 MB
- Released: 2025-08-18
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/polydelay/id6751120958/reviews.md

## What is PolyDelay?

PolyDelay Polyrhythmic Delay Plugin (AUv3)

PolyDelay is an audio effect plugin that can run standalone, or in any AU compatible host application such as Logic Pro or GarageBand.

Overview

PolyDelay is a dual delay line / stereo effect with optional host tempo sync. While PolyDelay can be used to create interesting stereo polyrhythmic delays, it can also produce more familiar delay patterns such as dotted eighth and quarter note triplets.

Polyrhythms, Divisions and Beats

PolyDelay calculates delay times based on a BPM (beats per minute) tempo, and the polyrhythmic notation of D:B, where D = divisions and B = beats. For example, 3:2 would mean that the time for 2 beats should be divided by 3. If you're more use to the idea of note lengths and delay times, such as quarter notes and dotted eighths, etc., this might be confusing at first, but hopefully this guide will help.

Firstly, everything starts with the beat! So, for 120BPM, each beat (or quarter note) will be half a second, or 500ms. So if you want a quarter note delay, you want 1 division within one beat, so you would set Divs and Beats to 1.

Here are some typical note values, lengths (120BPM) and their D:B values:

1/4 = 500ms = 1:1 (take the length of one beat, and divide that by one)
1/8 = 250ms = 2:1 (take the length of one beat, and divide that by two)
1/16 = 125ms = 4:1 (etc.)
1/32 = 63ms = 8:1 (etc.)

See how the divisions are doubled-up for each note? And here are some dotted and triplet note examples - see how the D:B numbers start to get interesting!

1/4D = 750ms = 2:3
1/4T = 333ms = 3:2
1/8D = 375ms = 4:3
1/8T = 167ms = 3:1

A classic stereo delay would be 1:1 (1/4) left, and 4:3 (1/8D) right with Width set to max. If you want a really long delay, a 1:8 setting would give you 4 seconds at 120BPM with Multiply set to Normal, or 8 seconds set to Half. The Presets also include some typical (and not so typical!) examples to get you started.

The fun really starts when you start mixing "unusual" (typically odd numbers) divisions and beats, such as 5:4 or 2:7. These sorts of relationships are what we typically refer to as polyrhythms. Try experimenting with PolyDelay on simple sequences and drum parts / patterns and you may start to hear all sorts of interesting rhythmic interplay as your brain tries to figure out what's going on!

For additional tone-shaping, PolyDelay includes variable stereo width, a high and low pass filter, stereo modulation and internal limiting to keep audio levels in check.

For more info and support please visit:

www.waverley-instruments.com/robjackson

## Key features

- Polyrhythmic delay calculations
- Host tempo sync
- Dual delay lines
- Stereo width control
- High and low pass filters
- Stereo modulation
- Internal limiting

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/polydelay/id6751120958/reviews.md

### 5/5 — Sooo Good, so small, gr8 on drum channel!

*2025-09-01*

I love this delay.  I like how I'm able to carve out the percussion.  Good stuff

### 5/5 — Just what I needed

*2025-08-20*

I own several delays. I only needed this .

### 5/5 — Pronouns Ace Fab and exceptional

*2025-08-19*

Once again the release of  an app  which is very versatile and sonically sound. I’m feeling a homage coming  on which will include all the Jackson instruments and effects which I possess since the release of the first version of Scaper. 👍

## Frequently asked questions about PolyDelay

### What is PolyDelay?

PolyDelay is an audio effect plugin that creates polyrhythmic and standard delay patterns. It can be used standalone or within compatible host applications like Logic Pro and GarageBand.

### How does PolyDelay calculate delay times?

PolyDelay calculates delay times based on BPM tempo and a D:B notation, where D is divisions and B is beats. This allows for complex rhythmic relationships beyond simple note lengths.

### What tone-shaping features does PolyDelay offer?

PolyDelay includes variable stereo width, a high and low pass filter, stereo modulation, and internal limiting to control audio levels and enhance the sound.

### Can PolyDelay sync to my project's tempo?

Yes, PolyDelay offers optional host tempo sync, allowing its delay times to align with the BPM of your music production software.

### What devices is PolyDelay compatible with?

PolyDelay is available for Mac, iPhone, iPad, and iPod, making it versatile for different production environments.

### How often is PolyDelay updated?

PolyDelay was last updated on January 18, 2026, indicating active development and support for the plugin.

### Does PolyDelay have ads?

No, PolyDelay does not contain advertisements, providing an uninterrupted user experience.

### What is the price of PolyDelay?

PolyDelay is a paid application, priced at $1.99.

## Version history (last 3 releases)

### 1.0.2 — 2026-01-18

Fix for "trails mode" not working properly when Active is toggled On and Off.

### 1.0.1 — 2025-09-15

Changing presets will no longer change Sync / Tempo settings.
Small UI button and slider cosmetic tweaks for improved contrast.

### 1.0.0 — 2025-08-18

No release notes.

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## More apps by Rob Jackson

- [moodscaper](https://appshunter.io/ios/app/moodscaper/id1088768073)
- [pianoscaper](https://appshunter.io/ios/app/pianoscaper/id1177444402)
- [moodscaper SE](https://appshunter.io/ios/app/moodscaper-se/id1247452905)
- [touchscaper](https://appshunter.io/ios/app/touchscaper/id1250344299)
- [guitarscaper](https://appshunter.io/ios/app/guitarscaper/id1316544251)
- [moodscaper LE](https://appshunter.io/ios/app/moodscaper-le/id1435065372)

All apps by Rob Jackson: https://appshunter.io/developer/1072346998

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*