Outstanding
I had it up and running in 10 minutes. You need to install some extra software but there are clear instructions on the website and I had no problems with them.
It's actually worth buying an iPad just for this app! That's how good it is.

Archived App (Last seen on 4 Apr 2026)
This is an archived listing of the app previously available on the App Store.This app provides a 53-button virtual control surface for playing MIDI synthesizers on your iPad. It offers customizable MIDI settings and a layout designed for Hayden concertina variations. It requires external MIDI hardware or compatible virtual instruments to produce sound.
3.1
September 17, 2021
Bug fixes. Upped the base iOS version to 13.0
MoreMIDIHayden is a 53-button virtual control surface for the iPad designed to emulate a Hayden concertina. It allows you to control hardware or software MIDI synthesizers.
No, MIDIHayden does not produce any sound. It functions solely as a controller, sending MIDI data to external hardware or virtual instruments.
MIDIHayden features a 53-button layout based on the R. Morse Beaumont Hayden Concertina, with an added D# on the left side for enhanced playability of common variations.
You can play chords by touching multiple buttons simultaneously. For optimal chord playing with four or more fingers, it's recommended to disable 'Multitasking Gestures' in your iPad's settings.
You can adjust volume, MIDI channel, attack velocity, and semitone transposition (+/- 12). All MIDI settings are saved and restored automatically.
MIDIHayden can send MIDI data to all CoreMIDI apps using 'Omni' mode or to specific virtual ports in apps like Sonosaurus ThumbJam when 'Virtual Port' is selected.
MIDIHayden is available for a one-time purchase of $4.99.
No, MIDIHayden does not contain advertisements.