# Geo Synthesizer

> Expressive multitouch musical instrument and MIDI controller with advanced pitch control. (iPhone/iPad app by Wizdom Music LLC.)

- Source: https://appshunter.io/ios/app/geo-synthesizer/id465224352 (this page in markdown: same URL + `.md`)
- Developer: [Wizdom Music LLC](https://appshunter.io/developer/377345351)
- Category: Music, Entertainment
- Price: $9.99
- Rating: 3.30/5 from 19 App Store ratings · 117 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 27 MB
- Languages: American English
- Released: 2011-10-28
- Data updated: 2026-09-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/geo-synthesizer/id465224352/reviews.md

## What is Geo Synthesizer?

Geo Synthesizer is a musical instrument and MIDI controller. Originally a collaboration of Wizdom Music's Jordan Rudess and Kevin Chartier (MorphWiz, SampleWiz) and Rob Fielding (Mugician), Geo Synthesizer is an incredibly expressive musical instrument specifically created for a multitouch surface. Jordan is now working with Roli-Labs, creators of the amazing Seaboard instrument on an exciting future for Geo Synthesizer and it's users!

A comprehensive Geo Synthesizer manual is available at: http://www.wizdommusic.com/GeoSynth/manual.html

Jordan says: "Since touching a preliminary piano keyboard on an iPhone screen and realizing the amazing potential for musical expression on a multitouch device, I have been inspired to create next-generation musical instruments for iOS. Geo Synthesizer is a dream come true in many ways. It is the fastest truly playable iOS instrument that I have put my hands on to date. I can fly through the range of an instrument while expanding on the kind of advanced pitch control we introduced in MorphWiz. As someone who grew up with synthesizers, I can tell you that pitch bending has never been this good!

"Geo features many of my custom sounds and in addition, Geo is also a MIDI controller, so you can use it with any external midi instrument or virtual MIDI.  Virtual MIDI allows you to control an app running in the background on the same device! Geo Synthesizer also now features AudioBus, a technology that allows one to interconnect audio apps in exciting new ways! A great feature of Geo is that internally and externally we send independent voices on each note played, so as an example, you can pitch bend one note and not the other, or add unique expression on every note! I can't wait to see the YouTube videos of all of you guys rocking out with Geo Synthesizer!!!"

Features:
- AudioBus
- ability to load waveforms from SampleWiz presets
- octave rounding for effortless soloing over large ranges
- whammy slider with absolute and relative modes
- 12ET, 24ET, 53ET, and 665ET temperament options
- mono, string, and full-polyphony modes
- tuning and transposition controls
- snap speed control to affect how quickly the instrument pulls notes in tune
- playing surface options for number of rows and columns on screen
- octave and fifth harmonics synthesis options to rich, organ-like sounds
- gain control to add distortion to the sound
- FM and touch FM controls for timbal variation
- mono out for use with guitar amps
- sine, sawtooth, square, and custom (SampleWiz) wave options
- attack and release controls
- synthesis body control
- lowpass filter with resonance
- stereo delay
- reverb
- MIDI output with polyphonic note bending and multiple configuration options to allow compatibility with a wide range of hardware and software synthesizers
- performance menu lets you make your own custom menu so all the controls you need are always right at your fingertips
- 40 presets carefully selected by Jordan Rudess, including patches from Jordan's personal sound library

## Key features

- Expressive multitouch interface
- Advanced pitch bending
- MIDI output
- AudioBus support
- Customizable performance menus
- Multiple temperament options
- Load SampleWiz presets

## What do users think of Geo Synthesizer?

Overall sentiment: mixed

**Pros**

- 💡 Innovative and expressive instrument
- 👍 Intuitive and adjustable interface
- 🚀 Fast and responsive performance
- 🎶 Great sound quality
- 🎛️ Excellent MIDI controller capabilities
- 🎸 Guitar-like playing experience
- 🎹 Versatile sound engine
- 🔊 Lush and rich sounds
- ✨ Useful for live performance
- 🌟 Highly playable instrument

**Cons**

- 🐛 Glitchy sound on iPad Pro
- ❌ App not working correctly
- 🗑️ Abandoned by developer
- ❓ Mistaken purchase
- 🚫 No longer works on iPadOS
- 😵 Unintuitive interface
- 💸 Waste of money
- 📉 No updates for years
- 😵‍💫 Ugly interface
- 🤔 Disappointing sound engine
- 📉 Limited sound library
- 👎 Poor compatibility with other apps
- 😵‍💫 Cartoonish look
- 💰 Pricey for features
- 🤔 Unfinished feel
- 👎 Built-in sounds could be better
- 😵‍💫 Cheesy graphics
- 🐛 Clicking sound issues
- 🐛 Audio drop out bug

**Commonly reported bugs**

- Glitchy sound on iPad Pro
- App not working correctly
- No longer works on iPadOS
- Clicking sound on iPhone 6
- Core MIDI not working like before (iOS 9)
- Crashing on launch (iOS 8.3)
- Audiobus initialization problem
- App crashes after last update
- New presets can't be loaded
- Envelope filters can't be adjusted
- No access to menu config page
- App shuts down on boot up (OS5)
- Crashes on start-up (iPad 2)
- Doesn't work on iPhone 4S
- Sounds sometimes drop out
- Horribly noisy until volume adjusted
- No smooth transitions between notes
- SampleWiz not working with it

**Most requested features**

- Update for iPadOS
- Fix glitchy sound on iPad Pro
- Support for Bluetooth MIDI
- Refund option
- Fix zooming issue on iPhone 11
- Add more columns like GeoShred
- Output MIDI note velocity based on touch pressure
- 3D Touch for velocity and aftertouch
- Assignable magic slider for FM or volume swells
- Broader sound library
- More control over MIDI output
- SF2 import for sounds
- MIDI input for live use
- Assign a major 3rd break between rows
- Record feature within the app
- Copy and paste functionality
- More intuitive menus and buttons
- More sophisticated patch programming
- Multi-channel pitchbending support
- More tutorial materials for technique and creativity

## Recent user reviews (10 of 117)

All indexed reviews: https://appshunter.io/ios/app/geo-synthesizer/id465224352/reviews.md

### 1/5 — Vários problemas

*2026-06-04*

Pena que esse app foi abandonado pelo suporte. Ê realmente um instrumento que poderia ser usado de forma profissional…. se funcionasse direito.

### 2/5 — Bad sound

*2025-10-30*

This app works great on my older iPad but it has a glitchy sound on my iPad Pro it sounds like it is not running at the correct bit rate.

### 2/5 — Bad sound

*2025-02-09*

This app works great on my older iPad but it has a glitchy sound on my iPad Pro it sounds like it is not running at the correct bit rate.

### 1/5 — Poderia ser muito bom.

*2024-11-14*

O aplicativo não está funcionando corretamente e não tem suporte para resolver.

### 1/5 — Abandoned

*2021-02-21*

Geo Synth is just a fun toy anymore.  Jordan has collected his money and has now abandoned it.  It had such potential.  It’s too bad.  I wonder what Jordan is hawking now.

### 1/5 — App not good

*2020-03-27*

I bought mistaking it for "Sample wiz",can I he refund?

### 1/5 — GET THIS APP UPDATED NOW.

*2020-01-26*

No longer works on iPadOS. This was not cheap and I expect it to be updated. Absolutely awful support.

### 5/5 — Please help

*2019-12-24*

It’s not showing whole notes of the instrument 
I have iPhone 11 why it is showing zoomed
How can I fix the size of this app

### 1/5 — Not as per expectations

*2019-12-02*

Kindly request to refund my money

### 2/5 — Disappointed.. :( no updates in the past 3 years

*2019-10-27*

I love the tones in this synth but there hasn’t been an update for 3 years which disappoints me

## Frequently asked questions about Geo Synthesizer

### What is Geo Synthesizer?

Geo Synthesizer is a musical instrument and MIDI controller designed for multitouch surfaces. It offers an incredibly expressive playing experience with advanced pitch control and the ability to generate a wide range of sounds.

### What are the key features of Geo Synthesizer?

Key features include an expressive multitouch interface, advanced pitch bending, MIDI output for controlling external instruments, AudioBus support for audio app interconnection, and customizable performance menus. It also offers various temperament options and sound synthesis controls.

### How much does Geo Synthesizer cost?

Geo Synthesizer is a paid application. The specific price can be found on the app store listing.

### What devices is Geo Synthesizer compatible with?

Geo Synthesizer is an iOS application, designed for multitouch surfaces. Specific iOS version compatibility can be found on the app store listing.

### Can I use Geo Synthesizer with other music apps?

Yes, Geo Synthesizer functions as a MIDI controller, allowing you to control external MIDI instruments or virtual MIDI apps. It also supports AudioBus, enabling you to interconnect audio apps in new ways.

## Version history (last 5 releases)

### 1.2.2 — 2016-02-03

This update from Apple will improve the functionality of this app. No new features are included.

- audio fixes for devices with 48kHz native sampling rate
- AudioBus updates for iOS 9
- reworked menu and playing surface text

### 1.2.0 — 2014-10-06

- AudioBus 2 fixes for iOS 8
- SampleWiz-to-Geo preset copy works properly again (also requires an update to SampleWiz)

### 1.1.2 — 2013-11-18

- fixed compatibility with Audiobus on iOS7

### 1.1.1 — 2013-07-26

In v1.1.1
- fixed menu issues on iPhone 5
- fixed preset text entry

In v1.1:
- We are very excited to now offer Audiobus support!

### 1.1 — 2013-07-19

- Updated for iPhone 5
- We are very excited to now offer Audiobus support!

## Apps similar to Geo Synthesizer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [120 Piano Chords](https://appshunter.io/ios/app/120-piano-chords/id743668973) | — | $3.99 | Music |
| [moForte Guitar](https://appshunter.io/ios/app/moforte-guitar/id771271868) | 5.0 (1) | $3.99 | Music |
| [MorphWiz Studio](https://appshunter.io/ios/app/morphwiz-studio/id6739972511) | 5.0 (5) | $19.99 | Music |
| [Music Theory Basics](https://appshunter.io/ios/app/music-theory-basics/id511394436) | 5.0 (1) | $3.99 | Music |
| [PaSSBot](https://appshunter.io/ios/app/passbot/id1557720096) | 5.0 (8) | $34.99 | Music |

## More apps by Wizdom Music LLC

- [MorphWiz](https://appshunter.io/ios/app/morphwiz/id377345348)
- [SampleWiz](https://appshunter.io/ios/app/samplewiz/id431031166)
- [Tachyon](https://appshunter.io/ios/app/tachyon/id544585980)
- [EarWizard](https://appshunter.io/ios/app/earwizard/id599466971)
- [HarmonyWiz](https://appshunter.io/ios/app/harmonywiz/id629564112)

All apps by Wizdom Music LLC: https://appshunter.io/developer/377345351

## Related topics

[hilda synthesizer](https://appshunter.io/ios/topics/hilda-synthesizer)

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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 2026-09-09.*