25. A control arrangement for a speech sound generating system, said speech sound generating system comprising: means for simulating the frequency response of the vocal tract, said frequency response including two or more resonant peaks or formants movable in frequency; means for simulating electrically the vibration of the vocal cords, with variable pitch period; means for combining said vocal cord simulation with said frequency response simulation of the vocal tract to produce a resulting waveform; and transducing means to cause the resulting waveform to be emitted as an audible sound; said control arrangement comprising; means continuously responsive to operator input for simultaneously and continuously controlling the frequency locations of all said formants; and additional means continuously responsive to operator input for controlling said vocal cord pitch variation.
40. An arrangement as defined in claim 25 wherein said means continuously responsive to operator input consists essentially of: three or more force-sensitive transducers located on the perimeter of a rigid surface; ratio-detecting means for producing voltage signals in two or more coordinate directions relating to the comparison of force magnitude at each of said force-sensitive transducers to the sum of forces at all of said force-sensitive transducers.