Stephen Mobley, who previously put together an impressive DIY laser harp project, has a new pitch to MIDI tracker that lets you AutoTune your theremin.

But, while the pitch tracking interface was originally created to add MIDI capability to a Vacuum Tube Theremin, it can also be the basis for a whole range of different electronic instruments.

The device is able to track both pitch and volume from its audio inputs and output a stream of realtime MIDI data that reproduces the sound using a MIDI equipped synthesizer.

Mobley sells the project documentation at his site. PCBs for the Pitch to MIDI Tracker are also available.

via shobley:

http://www.stephenhobley.com/store/0111/

I get asked about once a month if I can make a MIDI interface for the Theremin. So after completing the vacuum tube Theremin I thought it was about time I built one.

This device accurately matches Theremin Pitch to MIDI note, along with volume data – using a cunning blend of microprocessor, signal-processing hardware and some clever embedded software.

So far I’ve tested it with a PAIA Theremax, a Moog Etherwave Plus and my own Keppinger VT Theremin.

Not only does it produce pitch information, it can provide controller data, and realtime arpeggiation using simplified or complex chords – read from a MIDI keyboard connected to the input.

It even blends subtle pitch bend control into the MIDI stream to allow user controlled vibrato to be added. Just like a real Theremin.

Since enough people asked about it – I’ve put together a complete package here :
http://www.stephenhobley.com/store/0111/