This video, via nnoiz Papp, demonstrates using a breath controller to play a modular synthesizer, creating a sort of electronic didgeridoo patch. 

Technical Details:

Black Wavetable VCO by Erica Synths controlled by Hornberg HB1 breath controller.

MIDI CC02 goes to MUC800 MIDI-CV interface. CV signal controls Wavetable select and the VCA at the mixer channel (MIIIIX of ProModular).