TIPTOP AUDIO BUCHLA 285T FREQUENCY SHIFTER

The Frequency Shifter receives and external audio at its “signal” input then shifts it with either its internal oscillator “INT” or with an external oscillator at the “ref.” input. There is a switch to choose either INT or ref. The INT oscillator frequency goes from 0 to 1kc. The CV input is sent to the INT oscillator only and can be varied with its attenuverter. FM receives an audio input and can be applied to INT. The amount of modulation is determined by the attenuator knob. The resulting shifts are present at the “dierence” and “sums” outputs. There are two identical outputs for each of these. The “ring” double output is a pure ring modulation determined by the incoming signal and ref. The CV input and its attenuverter modulates the sweep from “zero-amplitude-ring. The bottom MODULATION section applies to the “variable” double output. The knob manually sweeps from zero (the pure incoming “signal”) through amplitude modulation ending in pure ring modulation. When this knob is set fu