# Hohner MIDI Piano Accordion — Accordion MIDI Controller

> iPad MIDI piano accordion controller for virtual and hardware synthesizers. (iPhone/iPad app by Michael Eskin.)

- Source: https://appshunter.io/ios/app/hohner-midi-piano-accordion/id1025454075 (this page in markdown: same URL + `.md`)
- Developer: [Michael Eskin](https://appshunter.io/developer/342739369)
- Category: Music, Education
- Price: $9.99
- Rating: 3.50/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 15 MB
- Languages: American English
- Released: 2015-08-29
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hohner-midi-piano-accordion/id1025454075/reviews.md

## What is Hohner MIDI Piano Accordion?

The Hohner MIDI Piano Accordion is a piano accordion-style CoreMIDI control surface for the iPad.

The app doesn't produce any sound on it own. It is a MIDI control surface designed for playing hardware and software VST-style MIDI synthesizers via a CoreMIDI compatible interface connected to the dock connector or virtual MIDI instruments like Roland Sound Canvas for iOS, IK Multimedia SampleTank®, or Sonosaurus ThumbJam running on your iPad.

The app has a two-octave 24-key treble keyboard and 36 bass/chord buttons.

Choose between Bass/Major/Minor/7 or Counter Bass/Major/Minor configuration for the left side of the instrument.

The bass/chord side may be transposed up or down two semitones using the control at the bottom left of the screen. Note that when the pitch is transposed, the note labels do not change. This may be addressed in a future update. This feature expands the range of bass side by shifting the entire bass up or down two rows.

Multiple buttons may be pressed at the same time.

You may slide your fingers between the buttons.

Touch the MIDI connector button to show the MIDI parameter controls.

Using the controls, you can set the MIDI channel (1-16), MIDI velocity, and MIDI volume independently for the treble, bass, and chords. You can also set the overall MIDI transposition for all three sections (+/- 12 semitones).

On the MIDI control screen you may setup four presets. Once setup, the presets may be selected from the main play screen. These can be used to quickly switch between instrument sounds while playing without having to bring up the MIDI settings page. All presets are saved when the app is closed.

Use the "Transmit MIDI Port" switch to choose between "Omni" sending MIDI data to all CoreMIDI apps (matches previous versions of the app) or "Virtual Port" sending to a named CoreMIDI virtual output port. When the "Virtual Port option is selected, the app will show up as an input option in apps that support virtual ports like Sonosaurus ThumbJam and MidiBridge. "Omni" mode is selected by default.

All MIDI settings are saved when the app quits and restored the next time it is run. 

Touch the Octave shift select at the bottom of the play scren to shift the treble side up or down one octave (after application of the transpose). The octave shift is saved with the current preset.

Touch the '?' icon to show the base layout note names for each button (without transposition).

Touch the '!' button to send an "All Notes Off" message to silence any "stuck" notes should they ever occur.

Touch the Hohner logo for the help screen with a link to the Hohner accordion website or touch the Accordion Life logo to start learning with online accordion lessons.

The app accurately maps the chord inversion on a real piano accordion to their equivalent MIDI note numbers.

All settings are saved when the app exits.

Here's the settings changes required for two popular synth apps:

IK Multimedia SampleTank:

- In Settings (touch the gear icon), enable "Background Audio"

Sonosaurus ThumbJam:

- In "Prefs", under "MIDI Control", in "MIDI General Options" enable "Use CoreMIDI" and "Active in Background"

Other CoreMIDI compatible synth apps will have similar settings.

Please visit the app support website to see some live demo videos and for the settings you will need to enable in the synth app you are using to have it work with the control surface.

You must disable "Multitasking Gestures" in your iPad General Settings to use this app to its fullest capability if you want to put down more than three fingers at a time.

## Key features

- Piano accordion layout
- 24-key treble keyboard
- 36 bass/chord buttons
- Customizable MIDI settings (channel, velocity, volume)
- Four savable presets
- Octave and bass transposition
- CoreMIDI compatible

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hohner-midi-piano-accordion/id1025454075/reviews.md

### 5/5 — I have a request

*2016-10-17*

Could you please move treble midi Chanel and put it on the keyboard between treble and bass . This way we can preset different sound for different Chanel and change sound like a real midi accordion

## Frequently asked questions about Hohner MIDI Piano Accordion

### Does Hohner MIDI Piano Accordion produce its own sound?

No, Hohner MIDI Piano Accordion does not produce sound on its own. It functions solely as a MIDI control surface to trigger sounds from external hardware or software synthesizers.

### What kind of instruments can I control with Hohner MIDI Piano Accordion?

You can control VST-style MIDI synthesizers via a CoreMIDI compatible interface or virtual MIDI instruments running on your iPad, such as Roland Sound Canvas for iOS or IK Multimedia SampleTank.

### What are the key features of the Hohner MIDI Piano Accordion layout?

It features a two-octave 24-key treble keyboard and 36 bass/chord buttons. The left side offers configurations for Bass/Major/Minor/7 or Counter Bass/Major/Minor.

### Can I customize MIDI settings in Hohner MIDI Piano Accordion?

Yes, you can set the MIDI channel (1-16), MIDI velocity, and MIDI volume independently for the treble, bass, and chords. Overall MIDI transposition for all sections is also adjustable.

### How many presets can I save in Hohner MIDI Piano Accordion?

You can set up and save four presets, which can be quickly selected from the main play screen to switch between instrument sounds without accessing the MIDI settings page.

### What is the price of Hohner MIDI Piano Accordion?

Hohner MIDI Piano Accordion is available for a one-time purchase of $9.99.

### What devices is Hohner MIDI Piano Accordion compatible with?

Hohner MIDI Piano Accordion is designed for iPad and is compatible with all iPads.

### How often is Hohner MIDI Piano Accordion updated?

The app was last updated on August 3, 2021, to version 2.4. While specific update frequency is not detailed, this indicates it has received updates since its release in 2015.

## Version history (last 5 releases)

### 2.4 — 2021-08-03

Updated metadata for iTunes App Store.

Bumped minimum iOS version to 13.0

### 2.3 — 2018-01-18

New Feature: The bass/chord side may be transposed up or down two semitones using the control at the bottom left of the screen. Note that when the pitch is transposed, the note labels do not change. This may be addressed in a future update. This feature expands the range of bass side by shifting the entire bass up or down two rows.

### 2.2.1 — 2016-10-25

Added the ability to shift the treble side +/- one octave.

Added the ability to edit and store four MIDI presets (A, B, C, D) that can be quickly switched on the main play surface. 

Each preset includes the MIDI channel and volume/velocity levels for the treble, bass, and chords as well as the overall transpose and octave shift for the treble side.

### 2.1 — 2016-10-24

Added the ability to edit and store four MIDI presets (A, B, C, D) that can be quickly switched on the main play surface. 

Each preset includes the MIDI channel and volume/velocity levels for the treble, bass, and chords as well as the overall transpose.

### 2.0 — 2016-02-10

New graphics.

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## More apps by Michael Eskin

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All apps by Michael Eskin: https://appshunter.io/developer/342739369

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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 2026-06-10.*