Blowstudio Hornet

A Music project Plymouth, UK

The Hornet is a new performance instrument. For enquiries contact:

New stretch target

With your help we've raised over £2000 which will enable the first batch of Hornets to be made - thankyou SO much!


Our stretch target is £3000. If we reach this we will:

1) Donate a Hornet to Plymouth Music Zone, "an award winning music charity engaging over 1000 disadvantaged children, young people and vulnerable adults with over 50 weekly activities delivered by up to 25 music leaders across Plymouth and beyond."

PMZ shares the ideology of the Hornet project - to enrich the lives of as many people as possible by getting them directly involved in music. We are really excited by the prospect of being able to work with PMZ, so please lend us your support in getting them a free Hornet to use.

2) Put the money towards developing new instruments that share the Hornet's 'democratic electronic music' philosophy - small, affordable, easy and fun to play. We already have a few ideas but your support will help us buy parts for prototypes and develop them into the next Blowstudio instruments.


So please, donate what you can and be part of bringing 'democratic electronic music' to the South West and beyond!


I'm Mike Blow. I'm a sonic artist and a lecturer in interactive media at Plymouth University. My dream is to make fun, unique digital instruments for everyone. For a few years I've been developing my own instruments around DIY / maker technologies.

Let me introduce you to the Hornet.

Its a kind of theremin - a musical instrument that you play by moving your hand above it in space. The Hornet uses the same method of gestural control as the original Theremin, an instrument designed by Russian inventor Lev Termen in the early 1900s. However the Hornet is digital and updates the idea with many more sound options and possibilities.

OK, what's so cool about it?

Well lets see...

It sounds great

The Hornet is a synthesizer with gestural control. Every Hornet has a voice switch and a mode switch, as well as speed and decay controls, to give you loads of sounds to explore.


Anyone can play it

There's no defined way to play a Hornet - its a new instrument and you can play it whatever way you like. 



There are no rules! Explore, experiment and make your own kind of music.

Its robust

With a metal box and laser-cut perspex top the Hornet is tough and looks cool.

Its value for money

I've made boutique, super expensive theremins before - but with the Hornet I wanted to make something that anyone could afford. Lots of work has gone into making it affordable while keeping the great playability and sounds of the previous versions.

Its portable

Its small and light and easy to throw in a bag, which means...

Its great for jamming on your own or with friends

Developed over several years of building and playing different versions, the Hornet is really fun for jamming and a great live performance instrument. Its perfect for improvisors, electronic and experimental musicians, but anyone can play them, and kids love them!


The Pro

Hornet also comes in a Pro version, which adds CV/Gate inputs so you can control it from your analog sequencer and sync it to your computer as seen in the main video. You can control pitch, note length and speed, and temporarily override your sequence at any time by turning the speed dial or putting your hand in the sensor beam.



How You Can Help

Our aim with the Hornet is to make them available to as many people as possible. With your help we hope to raise £2000 to fund the first production run. Every pound you pledge brings the hornet closer to production and we already have the support of Oxford Contemporary Music who have agreed to match-fund up to £1000! The first 20 Hornets are being offered at an earlybird discount and everyone who orders one during our crowdfunding campaign gets free UK postage and packing (international by arrangement). Thanks for reading, and please, pledge us some money today so we can bring the Hornet project to life!


Mike and Kayo Blow


About Blowstudio

Blowstudio UK is the creative practice of Mike and Kayoko Blow from Plymouth, England. We are sound artists, experimental musicians and DIY instrument builders. Mike is a lecturer in interactive media at Plymouth University and Kayo is an accomplished improvising electric guitarist from Osaka Japan.



Can I play tunes?

Yes(ish!). The method of sound generation and resolution of the sensor mean the notes are not always perfect concert pitches, but they are close. You can play melodies but as with every theremin it needs practice! If you want an instrument that's 100% in tune all the time, an electric piano might be a better bet.

What power does it need?

You'll need a 9V DC regulated supply, 500mA or greater. We use a Boss PSA230 and cheaper one from Maplin, and they are both fine. Polarity doesn't matter as the Hornet has reverse polarity protection. Caveat: if you're running effects too you'll need them on a separate supply from the Hornet. I've found if you try to run fx pedals and the Hornet off the same supply the signal gets noisy - if you have two separate supplies, everything works perfectly.

How does the CV/Gate work?

As the Hornet doesn't have an envelope generator the gate is a simple on/off. You can vary the duty cycle from your sequencer. The CV on the pitch works identically to the IR sensor. Its not mapped to a standard system (e.g. 1v/Oct) but if you use linear or chromatic scales on your sequencer you can create any pitch you want. The CV for speed, which is enabled by turning the speed control fully counter-clockwise, doesn't have a gate (i.e. its 'on' all the time) and allows you to step sequence different speed settings for some really interesting FM style effects.

Can I play it manually while its running a sequence?

Yes! You can override both the pitch and speed CV sequences. To override the pitch, wave your hand over the IR sensor. The Hornet Pro will respond to your hand controls and return to the sequence once you take your hand away. To override the speed CV sequence, turn the speed control clockwise. When you return the speed control to the fully counter-clockwise position, the sequence will resume.

This functionality means you don't sacrifice the playability of the Hornet even if you have it running from a sequencer.

Can I have one in time for Christmas?

I'm afraid not. Sadly there isn't time to build them for Christmas delivery, as part of the production process will be designing and making up circuit boards, which takes a few weeks. However we will post everyone who buys one a Hornet gift card which you can give, and we promise to ship the real thing to you as soon as possible!