# Matrix Vocoder

> Voice transformer app simulating classic analog vocoder sounds. (iPhone/iPad app by Harry Gohs.)

- Source: https://appshunter.io/ios/app/matrix-vocoder/id1464318049 (this page in markdown: same URL + `.md`)
- Developer: [Harry Gohs](https://appshunter.io/developer/382428644)
- Category: Music
- Price: $5.99 (on sale, was $9.99)
- Rating: 4.30/5 from 20 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 9 MB
- Languages: American English
- Released: 2019-09-26
- Data updated: 2026-08-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/matrix-vocoder/id1464318049/reviews.md

## What is Matrix Vocoder?

Matrix Vocoder transforms your voice into an electronic instrument!

The Vocoder was invented by Homer Dudley in the mid-30's of the last century. Dudley worked at Bell Laboratories, 
and this is where the first Vocoder took shape.


The Matrix Vocoder is designed to properly simulate the classic analog Vocoder sound made famous e.g. by the music of the 
german band Kraftwerk. At there last world tour they used in fact the PC version of our Matrix Vocoder on stage !

The epic Cylon Robot voice is 

The basic function of a Vocoder is characterised by an analysis of the input signal, usually speech but other type of inputs can also be very interesting. In a special filter bank, a spectral analysis is performed and signals are developed which follows the amount of spectral energy in each channel. Another part of the analyser tests if there are unvoiced or voiced sounds at any particular time and extracts the pitch of the voiced sounds. 

The output section of the vocoder consists of a stereophonic synthesis filter bank which assembles the new synthetic speech from the characteristic filter envelopes from the analysis stage together with an external or internal replacement signal.


- 32 channel Filterbank with 8-pole Butterworth analog filters
- Stereophonic synthesis with analog modelled alias free oscillators.
- External carrier possible ( left channel = voice / right channel = carrier )
- Voiced/Unvoiced detection
- Pitch tracking
- Formant shift
- Matrix uses patchbay to connect analysis and synthesis channels. 
- Pan position and level for each channel.
- 16 internal oscillators with unlimited voices for choir like sounds.
- Stereo wide panorama parameter for internal generator.
- Optional monophonic generator with Glide setting.
- Internal noise generator.

- Effect AudioUnit and Music Effect AudioUnit
- stand alone / Audiobus 3 / IAA

## Key features

- 32 channel filterbank with analog filters
- Stereophonic synthesis with alias-free oscillators
- External carrier input
- Voiced/Unvoiced detection and pitch tracking
- Formant shift
- Patchbay for channel connection
- 16 internal oscillators for choir sounds

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/matrix-vocoder/id1464318049/reviews.md

### 1/5 — Doesn’t work?

*2026-03-16*

I can’t seem to find anything I’m doing wrong but seems pretty busted to me

### 1/5 — Fake vocoder

*2025-09-17*

Ist das Geld nicht wert und es gibt keine Rückerstattung,
ganz mies!

### 4/5 — Works

*2024-11-29*

Works for me (iOS 17.6) and works with AudioBus3 as the site stated it would.

### 4/5 — Confused!

*2023-12-07*

I have no idea how to apply this app! If I could get a refund I would. That being said, I gave it a four star rating because it seems very cool and I am probably just ignorant of the application! Too much work goes into developing an app to have it devalued by me, but it needs instructions!

### 3/5 — Looks great, can’t get it to work

*2022-01-22*

I’m sure it’s great from then\ YT videos, but it doesn’t seem to work properly on my iPad Pro M1.  O modulation happens. Even in standalone using mic headphones and built in keyboard. Is this a bug or is it me?

### 5/5 — Come on!

*2021-04-10*

Everyone loves it! I open it on my iPad! You should download the app!

### 2/5 — Pretty Buggy...

*2020-07-15*

I’ve tried this several times and the presets and all of the options in the settings menu don’t show up.  They are just blank..nothing is there.  I’ve tried deleting and re-downloading it again several times and each time it’s the same.  Really bummed about this!

### 1/5 — What is the difference

*2020-02-26*

To be quite honest it just sounds like all the other vocal ones you've got which do not work

### 3/5 — Awesome, but...

*2020-01-05*

...the app crashes when I select ‚Bluetooth MIDI‘ on IPad Pro. 5 stars if crash is getting fixed. Keep up the good work

### 5/5 — Great sound!

*2019-11-02*

Love the quality of the voice. The vocoder is very nice. More presets would be handy.

## Frequently asked questions about Matrix Vocoder

### What is Matrix Vocoder?

Matrix Vocoder transforms your voice into an electronic instrument, simulating classic analog vocoder sounds. It analyzes input signals and reassembles synthetic speech using advanced filter banks and replacement signals.

### What kind of sounds can Matrix Vocoder create?

It can create a wide range of electronic voice effects, including the iconic Cylon Robot voice and epic choir-like sounds using its 16 internal oscillators.

### Does Matrix Vocoder support external audio sources?

Yes, Matrix Vocoder allows for external carrier input, where the left channel can be your voice and the right channel can be the carrier signal.

### What are the technical specifications of the filterbank in Matrix Vocoder?

Matrix Vocoder features a 32-channel filterbank with 8-pole Butterworth analog filters for detailed spectral analysis.

### Is Matrix Vocoder available on multiple devices?

Matrix Vocoder is supported on iPhone, iPad, and iPod, making it accessible for a wide range of Apple users.

### How often is Matrix Vocoder updated?

The app was last updated on May 22, 2025, indicating ongoing development and potential for future improvements.

### What is the price of Matrix Vocoder?

Matrix Vocoder is available for a one-time purchase of $4.99.

### Does Matrix Vocoder have ads?

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

## Version history (last 4 releases)

### 1.1.1 — 2026-08-07

- Apple Silicon Mac Availability enabled
- AU/AUFX Automation fixed

### 1.0.2 — 2025-05-22

- AUv3: distorted sound in Cubasis fixed
- Crash in Camelot Pro fixed

### 1.0.1 — 2020-07-29

- Fixed UI display issues with light/dark appearance system setting

### 1.0.0 — 2019-09-26

No release notes.

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## More apps by Harry Gohs

- [iVoxel](https://appshunter.io/ios/app/ivoxel/id382428641)
- [iSyn Poly](https://appshunter.io/ios/app/isyn-poly/id443141370)
- [Addictive Synth](https://appshunter.io/ios/app/addictive-synth/id447072653)
- [Addictive microSynth](https://appshunter.io/ios/app/addictive-microsynth/id455651228)
- [Harmony Voice](https://appshunter.io/ios/app/harmony-voice/id532501340)
- [AudioReverb](https://appshunter.io/ios/app/audioreverb/id670248970)

All apps by Harry Gohs: https://appshunter.io/developer/382428644

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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.*