When editor in chief Stephen Fortner reviewed the Moog Music Theremini, he briefly mentioned a software editor for iPad that was in beta and was designed to allow full access to the instrument's underlying synth engine--itself derived from Moog's wildly successful Animoog synth app for iOS.
The final release version of that editor is now available as a free download from Apple's App Store. CLICK HERE to get it.
The editor allows access to waveform and wavetable choices, including scanning behavior; filter type, cutoff, resonance, and pitch tracking; delay type, time, feedback, and amount; and perhaps most importantly, convenient Save functions so that you don't have to send MIDI CC 119 (the previous method) in order to save changes to a sound preset. Speaking of presets, there are also a ton more of them included with the editor.
The app doesn't generate sound by itself; you need a connected Theremini for that. That may seem to be stating the obvious, but given the editor's tasty complement of knobs and presets, a beginner could be forgiven for thinking it's a soft synth.
CLICK HERE for Moog's product page on the Theremini.