Altura MkII+ Theremin MIDI Controller / Arpeggiator

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  • All-new steel case with upgraded graphics
  • Simplified circuit board–easier to build
  • More robust LED display
  • DIY Kit or Ready-to-Play

The Altura MkII+ is a MIDI controller / sequencer / arpeggiator that emulates a theremin. As you move your hands  in the air, the Altura MkII+ transmits MIDI data to your synthesizer to control pitch, volume, velocity, bend, modulation, portamento, and more! Save presets. Program an 8-step sequence, play it up and down the scale, enter a tap tempo, change to double time or half time.

Control any MIDI synthesizer, such as the Macchiato Mini Synth.

  • Requires 9V DC power: 9V battery (not included) or plug-in power supply, below.
  • Requires a MIDI cable, below.
SKU: AT2 Category: Tag:

Altura MkII+

9V DC Power Supply

Power your Altura with this 9V DC center-negative power supply, or use a 9V battery.

MIDI Cable 5 Pin DIN 5 ft (1.5m)

Connect your Altura to the outside world with this typical MIDI cable.

USBTiny Programmer

Use this device to update or restore the software in your Zeppelin products. Use the free ZDL Updater App for PC to install drivers and obtain all the latest software.

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The Altura MkII+ Theremin MIDI Controller emulates the behavior of the early electronic instrument invented by Russian physicist Léon Theremin in 1920.  With Theremin’s gadget, as the player moves his right hand closer to one antenna, the device emits an eerie tone that rises in pitch. As the player moves his left hand farther away from the other antenna, the tone becomes louder. The device is very sensitive, and makes wonderful, spooky music – but it is very tricky to play. The performer can only play by ear: there are no frets in mid-air!

Our MIDI Controller version uses a pair of range finders in place of antennas, and rather than producing sound directly, the Altura MkII+ emits MIDI messages that are interpreted by your separate synthesizer. The Altura MkI+I was designed as a companion to the Macchiato Mini Synth by Zeppelin Design Labs: there are a few special features that will only work well when paired with the Macchiato. Otherwise, the Altura MkII+ conforms with General MIDI 1.0 specifications and should easily control any device bearing this mark.

Many MIDI devices do not conform to the General MIDI 1.0 specification. In these cases, you may need to fiddle with your synthesizer some before it will respond properly to the Altura MkII+.

You can run your Altura MkII+ straight into your PC or Mac workstation with a MIDI-to-USB converter (not included).

Please download the Quick Start Guide and Reference Manual for all the details!

  • The DIY kit requires soldering. Examine the assembly manual before buying.
  • Includes 20AWG steel case.
  • Optional 9V DC Power Supply — or use a 9V battery (not included).


(unchanged from MkII)

  • Right Sensor – MIDI Pitch (Note On/Off)
    • Octave Select – set 1 to 8 octaves, ascending or descending
    • Key Select
    • Scale Select – choose from 12 different modes
  • Left Sensor – Send Control Change
    • Pitch Bend
    • Modulation
    • Velocity
    • Channel Volume
    • Portamento Time
    • Adjustable to any range of values from 0-127, ascending or descending
  • X-Y Mode: Both left and right sensors send Control Change data, any value, any two controllers
  • Transmit Channel selection
  • Arpeggiator / Step sequencer
    • Program any 8-step sequence over a 2-octave range
    • Use right hand to set initial note
    • Sequence always plays in selected key and scale
    • Tap Tempo
    • Use left hand to multiply tempo
  • Save / Read up to 21 presets
  • Articulation (responsiveness) adjust
  • 9V DC Power Input — wall wart or battery
  • MIDI Out
  • Power On indicator
  • 3-digit display
  • ISP Header


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What You Will Need

Here’s everything you will need to build the Altura MkII+ Theremin MIDI Controller  kit. *These tools are available from Zeppelin Design Labs; follow the links!


  • Quick Start will get you playing fast!
  • Reference Manual contains detailed information explaining every feature
  • Watch the companion video on YouTube
    It's fairly easy to keep your Atlura MkII+'s software up to date, or to refresh corrupted software. You will need:
  • the free ZDL Updater App for PC.
  • a USB-Tiny programmer -- a little piece of hardware that connects your PC to your Altura.
  • the latest software, which you will find on the ZDL Updater App page, on the What You Will Need tab.