THE MOOG TAURUS IS A FOOT-CONTROLLED PEDAL SYNTHESIZER COMBINING THE FEATURES OF A SYNTHESIZER-GOOD SOUND AND VERSATILITY-WITH FOOT CONTROLLED SOUND MODIFIERS AND PRESETS. THIS VERSATILE MUSICAL INSTRUMENT OFFERS THE CAPABILITY OF PRODUCING TRADITIONAL OR NEW SOUNDS, INSTANTLY SELECTABLE FROM THE FOOT-CONTROLLED PRESETS. ONE OF THESE PRESETS IS FULLY PROGRAMMABLE SO THAT THE PLAYER MAY SET UP A "SOUND" AND GETTO IT INSTANTLY. TO PROVIDE MAXIMUM PROTECTION, THE UNIT IS ASSEMBLED IN A RUGGED WOOD AND METAL HOUSING. The basic functions of the Taurus Synthesizer (see accompanying block diagram) are programmable. That is, values of the various parameters that are used to control the details of a sound are determined either by the internally fixed values (for the three fixed presets) or set by the player accessible controls (for the VARIABLE preset). In normal usage, the VARIABLE preset is set up prior to performance using the VARIABLES controls in the control box. During actual performance, the player selects one of the four presets instantly by depressing one of the four PRESETS foot-buttons. These four PRESETS are mutually exclusive, that is, only one preset may be ON at any one time. The basic tone sources are two voltage controlled oscillators (A and B). Two basic pitch controls are used for fine tuning the instrument. First, the TUNE control is used to set the pitch of both oscillators to the desired reference, such as another instrument being used simultaneously. The BEAT control is used to make fine adjustments in the relative pitch of the two tone oscillators (by modifying the "B" tone source pitch). In addition to these basic tuning controls, the "B" tone oscillator pitch in the VARIABLE preset mode may be varied over a greater than one octave range by adjusting the OSC B FREQ control. The relative pitches of the two tone sources are internally set for the three fixed presets.