# OkChorale — Chorus / Vibrato AudioUnit

> Analog-style stereo chorus and vibrato audio effect plugin. (iPhone/iPad app by Rob Jackson.)

- Source: https://appshunter.io/ios/app/okchorale/id6742844149 (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 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 12 MB
- Released: 2025-03-10
- Data updated: 2026-08-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/okchorale/id6742844149/reviews.md

## What is OkChorale?

OkChorale Chorus / Vibrato Plugin (AUv3)

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

Overview

OkChorale is a stereo chorus / vibrato effect inspired by classic analog stomp boxes. While not intended to be a model or replica of a specific unit, the processing and features embrace a bygone era of simpler times! Both chorus and vibrato effects are achieved by modulating the time of a delayed version of the dry signal. Typically, these delay times are very short, between 5-20ms.

Parameters

Active - Toggles the effect On or Off.

Rate - Varies the modulation LFO frequency between 0.1-10.0 Hz. Typically, chorus sounds better with slow modulation, and vibrato is more noticeable and natural with higher rates.

Depth - Sets the amount of delay modulation, as a percentage of the maximum modulation delay time.

Mode - Toggles between Chorus and Vibrato mode. In Vibrato mode, the base delay time is very short and no dry signal is present in the plugin's output. In Chorus mode, the delay time is longer, and the dry signal is mixed with the delayed version. When used in stereo, the left and right channel's modulation is out of phase to create a wide stereo effect. The modulation wave shape is also different, depending on the mode. In Vibrato mode, a sine wave is used. In Chorus mode, a slightly rounded, and more "analog-like" triangle wave is used.

Despite the basic design and lack of features, we hope you agree that OkChorale can still sound pretty OK!

If the name sounds familiar, OkChorale is a version of the OK CHORALE module developed for Voltage Modular by Waverley Instruments. For more info and support please visit:

www.waverley-instruments.com/robjackson

## Key features

- Stereo chorus and vibrato effect
- Analog stomp box inspiration
- Adjustable modulation rate (0.1-10.0 Hz)
- Adjustable modulation depth
- Chorus and Vibrato modes
- AUv3 compatible

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/okchorale/id6742844149/reviews.md

### 5/5 — 👍🏼👍🏼

*2026-06-17*

Using this mostly for the vibrato. Sounds fantastic!  Simple UI AND light on CPU.

## Frequently asked questions about OkChorale

### What is OkChorale?

OkChorale is an audio effect plugin that provides stereo chorus and vibrato effects, inspired by classic analog stomp boxes. It can be used standalone or within any AU compatible host application like Logic or GarageBand.

### What are the main parameters in OkChorale?

The main parameters are 'Active' to toggle the effect on/off, 'Rate' to control the modulation LFO frequency from 0.1-10.0 Hz, and 'Depth' to set the amount of delay modulation. You can also switch between 'Chorus' and 'Vibrato' modes.

### How does OkChorale differ between Chorus and Vibrato modes?

In Vibrato mode, the base delay time is very short and no dry signal is present. In Chorus mode, the delay time is longer, and the dry signal is mixed with the delayed version, creating a wider stereo effect with out-of-phase modulation.

### What devices does OkChorale support?

OkChorale is supported on Mac, iPhone, iPad, and iPod. It utilizes the AUv3 audio unit format, making it compatible with a wide range of Apple devices.

### How much does OkChorale cost?

OkChorale is a paid application, available for a one-time purchase of $1.99. There are no in-app purchases or subscription fees associated with this app.

### Is OkChorale suitable for younger users?

OkChorale has an age rating of 4+, making it suitable for users of all ages. Its functionality is focused on audio processing rather than content that would be restricted.

### How often is OkChorale updated?

The latest version, 1.0.12, was released on March 23, 2025, indicating recent development and support. Users can expect updates to maintain compatibility and potentially add new features over time.

### Does OkChorale have ads?

No, OkChorale does not contain advertisements. As a paid application, it offers an uninterrupted user experience without any ad interruptions.

## Version history (last 4 releases)

### 1.0.12 — 2025-03-23

Random (*) bug fix...

Fix for Preset Randomize option not randomizing the Depth parameter with appropriately random values.

(*) see what I did there?

### 1.0.11 — 2025-03-14

A leak and a tweak...

Fixed a very small memory leak.
Microphone access permission message tweaked.

### 1.0.9 — 2025-03-12

Added Presets list option to Randomize effect parameters in response to a few random requests.

### 1.0.7 — 2025-03-10

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 2026-08-25.*