HARMONIZE ANYTHING

The world's first plug-and-play MIDI Harmonizer. Built for any musician, any instrument.

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Loved by musicians worldwide

Press a button and play in harmony. in real time.

What's in the box

  • Fully assembled Adafruit MacroPad RP2040
  • Custom MTG firmware pre-loaded
  • DIY Guide PDF
  • Setup guides for Ableton, Logic Pro X, and HX Stomp

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Whether you're just curious or ready to go - there's a starting point for you.

Best for beginners

How to Build a MIDI Harmonizer

Understand exactly how MIDI harmonising works and how to code one yourself - before you spend a penny on gear.

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Most popular

E-Book + Online Workshop

Get the full guide plus a live session with Ed Hogben where he walks you through the entire setup, answers your questions, and gets you unstuck.

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Not sure? Take our 2-minute quiz to find your perfect starting point →

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5-star reviews from live performers
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Ships to the UK & worldwide
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As seen on

By a musician, for musicians.

Hi, I'm Ed! After all the support from many of you across the world, I wanted to find a way to give my harmoniser to you guys. The result is this device, which you can use on a computer with stock DAW plugins.

I can't thank you guys enough for all the postive energy people having been giving to this from across the world. I've got a lot of exciting plans ahead for this, so stay tuned!

Got questions?

Not at all. The Starter Kit is fully pre-flashed and plug-and-play. All you need is a computer and DAW (Logic Pro X or Ableton Live). The setup takes less than 30 minutes then you're good to go!
The kit uses your DAW's stock pitch shifter plugins alongside the harmoniser - providing extremely low latency and costing you nothing extra.
Yes - the harmoniser works with any instrument and a microphone. Get creative!
We ship from the UK. UK delivery is typically 2–5 working days. International shipping is available - check at checkout.
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