Here is a patch for the Pro-One
which gives it a strange vocal like sound.
Craig Robinson

OSC A - Freq: 0 (A=440)  Oct: 0  Saw: on  Squ: off  Sync: off
OSC B - Freq: 10  Oct: 3  Saw: off  Tri: on  Squ: off  Normal  Kybd: on
Modulation - 
	From - Fil Env: 0   Osc B: 6.5  direct   Lfo: 3  wheel
	To - Osc A Freq: wh  Osc A PW: off  Osc B Freq: wh  Osc B PW: off
		Filter: direct
LFO - Freq: around 6 (vary for own taste)  Triangle
MIXER - Osc A: 10  Osc B: 0  Noise/Ext: 0 (Can add touch for breath noise)
Sequencer and Arpeggiater: off
MODE - Retrig   Normal   Drone:off
GLIDE - Vary for taste, usually set around 3 and Auto
FILTER - Cutoff: 0  Resonance: 4.5  Env. Amt.: 4  Keyboard Amt.: 4
	Attack: 0-4  Decay: 5  Sustain: 0  Release: 3
AMPLIFIER - Attack: 0-4  Decay: 6  Sustain: 0  Release: 4.5