# Sirens' Chor - Synth Chorus — Audio Unit V3 synth chorus efx

> Experimental audio effect app for creating chorus with harmonic sine wave synthesis. (iPhone/iPad app by Aleksandar Mlazev.)

- Source: https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812 (this page in markdown: same URL + `.md`)
- Developer: [Aleksandar Mlazev](https://appshunter.io/developer/1093798140)
- Category: Music, Utilities
- Price: $3.99
- Rating: 4.00/5 from 2 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 11 MB
- Languages: English
- Released: 2020-02-03
- Data updated: 2026-06-21
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews.md

## What is Sirens' Chor?

This one is quite experimental and CPU heavy app!
 
While working on my Chord Detector app I came up with the idea to play the found harmonics with sine wave oscillators so I can hear what the algorithm is hearing :) It turns out to be an interesting output that led me to creation of this audio effect app.
What happens here is that the input is analysed for main harmonics in the range of 80Hz to 1500Hz. Then a series of sine wave oscillators are set to play those harmonics with the exact frequency and volume and their output is added to create a second voice. This second voice can then be mixed with the input to create some kind of chorus or played alone. All this is CPU heavy process so it should be used with care...

Also to make this effect possible I had to use limited range 80Hz to 1500Hz so it is not suitable for every instrument and you have to keep that range in mind when producing. 

Some very fast volume and frequency changes are applied to the oscillators.  

The app is AUV3

## Key features

- Harmonic analysis of input audio
- Sine wave oscillator synthesis
- Adjustable chorus effect
- Second voice generation
- AUV3 plugin support

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/sirens-chor-synth-chorus/id1497361812/reviews.md

### 4/5 — Wow

*2021-09-27*

Awesome but as soon as I add one more track on AUM after setting up just one track with the effect dsp goes off the tracks guess I’ll be sampling more so I can save dsp. And I’m on a gen 3 iPad Pro 12.9

### 5/5 — I like this effect

*2020-04-02*

I like these apps by this dev. They are simple yet efficient. However, this one is probably his best so far.

### 4/5 — Nice effect

*2020-03-22*

Just wish it wasn’t such a drain on my dsp

## Frequently asked questions about Sirens' Chor

### What is Sirens' Chor - Synth Chorus?

Sirens' Chor - Synth Chorus is an experimental audio effect app that analyzes input audio to create a secondary harmonic voice using sine wave oscillators. This can be used to create chorus effects or as a standalone voice.

### How much does Sirens' Chor - Synth Chorus cost?

Sirens' Chor - Synth Chorus is a paid app, priced at $3.99.

### What devices does Sirens' Chor - Synth Chorus support?

Sirens' Chor - Synth Chorus supports iPhone, iPad, and iPod.

### What is the age rating for Sirens' Chor - Synth Chorus?

Sirens' Chor - Synth Chorus has an age rating of 4+.

### When was Sirens' Chor - Synth Chorus last updated?

Sirens' Chor - Synth Chorus was last updated on April 5, 2023.

### Does Sirens' Chor - Synth Chorus have ads?

No, Sirens' Chor - Synth Chorus does not contain advertisements.

### What is the frequency range Sirens' Chor - Synth Chorus analyzes?

Sirens' Chor - Synth Chorus analyzes harmonics within the range of 80Hz to 1500Hz.

### What are users saying about Sirens' Chor - Synth Chorus?

Based on limited data, Sirens' Chor - Synth Chorus has an average rating of 4.0 stars from 2 ratings.

## Version history (last 3 releases)

### 1.2 — 2026-06-11

Updated with new SDK

### 1.1 — 2023-04-05

Updated with new SDK

### 1.0 — 2020-02-03

No release notes.

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## More apps by Aleksandar Mlazev

- [Fine Chromatic Tuner](https://appshunter.io/ios/app/fine-chromatic-tuner/id1093798141)
- [Frequency Sound Generator](https://appshunter.io/ios/app/frequency-sound-generator/id1098669497)
- [Fine Bass Tuner](https://appshunter.io/ios/app/fine-bass-tuner/id1099100372)
- [Sonic Synth : FM synthesizer](https://appshunter.io/ios/app/sonic-synth-fm-synthesizer/id1104940736)
- [Drum Beats Metronome](https://appshunter.io/ios/app/drum-beats-metronome/id1115616093)
- [Guitar Tabs X - tabs editor](https://appshunter.io/ios/app/guitar-tabs-x-tabs-editor/id1138809362)

All apps by Aleksandar Mlazev: https://appshunter.io/developer/1093798140

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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 2026-06-21.*