Compound Touch Controlled Voltage Source

A 4-octave keyboard with eight separate sections and a total of 38 outputs -- sufficient functional density and diversity to facilitate responsive control of elaborate configurations

The main section has 48 touch-sensitive keys and both monophonic and polyphonic voltage, pressure, and pulse outputs. Voltage outputs can be offset or modulated by applied control voltages or audio signals. Two, three, or four voice polyphony can be implemented. Polyphonic operation is musically logical—a sustained voice is not "stolen" by a trill; pressure outputs respond only to the activating keys.

An 8-key section has individually tunable keys, both separate and common pulse outputs, and equal interval voltage output and status indicators. It finds applications in selectively initiating events, addressing segments of function generators and altering modes and tunings.

Two joysticks with X and Y outputs provide single point control of two variables (modulation frequency and index, for example). When plugged into a model 227 System Interface, the offer a convenient means for locating sounds in quad space.

Additional resources include three keys with individual pulse and pressure outputs, and a bipolar control voltage output, particularly appropriate to pitch-bending and vibrato. Buffered digital output, for interfacing to digital processors, are also provided.