Irijule TheoryBoard - a midi keyboard with built in 'smarts' about Music Theory, chords, scales, etc

They are currently in a 2nd kickstarter:

Pricing ranging from $499 to $799. Pricey, but then again it has a lot of touch sensitive pads and displays and multicolor LEDs.

Here is a review:
Irijule TheoryBoard Review // Can it help you write chord progressions and melodies? // THY-333

and the company website:

I didn’t find any mention of open sourceness or open hardware.

I’m tempted - It’s gotta be a better value than a ‘midi chord pack’!


I own one. It is a great tool but has drawbacks, read on before deciding whether you really want it or not.
There is nothing open source in it … even the main developer is not there anymore… no updates ever

Very interesting - if you could describe the drawbacks as you see them, even briefly, I would appreciate it.

OK. I like the way it works, so it is easy to improvise on a scale and get out of my standard chords. it fits well with my working style.
Now for the drawbacks :

  1. the pads sensibility is not that great compared to all other products on the market using sensistive pads. The trigger needs more force, so you get less sensistivity for low pressure. Private people outside of Irijule are selling foam pads to add under the rubber (I’ve done that) and it make the pads now with a correct sensitivity. But that’s a shame for a new prodcut in 2022/2023 compared to other products.
  2. Many features are announced since the launch 2 o 3 years ago. Absolutely NO firmware update has ever been released, and it looks like it will never happen. You’ll find a lot of information about it on related facebook pages. So if you’re ahhpy with current product abilities that’s fine, but don’t expect any update to come, unless something really new happens @irijule.
    Again look closely at user comments to make up you mind. this is a real product I can confirm, look at my videos here if you want
    this one BEFORE sensitivity mod Irijule TheoryBoard Thy333 test - YouTube
    these ones AFTER sensitivity mod
    Korg Wavestate Poly aftertouch with a Theoryboard THY333 - YouTube
    Irijule TheoryBoard Thy333 with Sensivity Mod - YouTube

I hope that helps

That helps indeed, thank you!

expensive toy imho !
Although it looks great :face_with_diagonal_mouth:

So to encode conventional-chromatic-12tet music theory the 12 ‘column’ seems strongly appropriate. The 4 ‘rows’ seems more arbitrary, could be anywhere from 3 to 6 or even 12.

To accommodate other tunings the keys-buttons could be hexagonal in a 12 x 12 ‘matrix’.

And of course, it turns out someone has been here before:

Harmonic table note layout - From Wikipedia,

The Harmonic Table note-layout, or tonal array, is a key layout for musical instruments that offers interesting advantages over the traditional keyboard layout.

Its symmetrical, hexagonal pattern of interval sequences places the notes of the major and minor triads together. It is sometimes called the Melodic Table note-layout, and more rarely the Triad note-layout. It is related to the Wicki-Hayden based keyboards and other isomorphic keyboards, both of which can be utilized on the jammer keyboard musical interface.

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This looks like something by Harry Partch [sp?], who built acoustic instruments I’m surprised his eccentric work isn’t referenced in this Wiki page.