Moog CP-251 Control Processor

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The Moog CP-251 Control Processor is a collection of classic modular synthesizer circuits designed by Bob Moog.

The Moog CP-251 Control Processor can be used in connection with one or more moogerfooger analog effects modules, the minimoog Voyager, or other voltage-controlled gear. The CP-251 adds the same kind of power and versatility of the classic MOOG modular synthesizers.

Using the Moog CP-251 Control Processor with the Moogerfooger analog effects, minimoog Voyager analog synthesizer, or other voltage-controlled synthesis gear you can generate, modify, combine, and distribute control voltages for creating complex sound events with patch cords.

The CP-251 provides a dual waveform LFO, Noise Generator, Sample-and-Hold circuit, as well as two attenuators, a lag processor, a CV mixer and a 4-way mult. This gives you ways to modify, mix, and distribute control voltages to product the incredible variety of sounds and effects that analog synthesizers are famous for.

Moog CP-251 Control Processor features include

• FOUR INPUT MIXER - Enables you to combine control signals to create complex effects.
• LAG PROCESSOR - Reshapes control signals by slowing down abrupt changes, used to produce glides and swoops.
• LOW FREQUENCY OSCILLATOR (LFO) - Makes periodic control signals over the range of one cycle every five seconds to 50 cycles per second. The LFO is itself voltage-controlled so you can vary its rate with an expression pedal or other control signal to create effects such as vibrato, warbles, and sirens.
• Two ATTENUATORS - To reduce the strength of control signals, enabling you to adjust the strength of an effect.
• FOUR-WAY MULTIPLE - Enables you to send one control signal to as many as three destinations.
• NOISE SOURCE - Provides pure noise for use as an audio or control signal.
• SAMPLE AND HOLD - Produces stepwise control signals by sampling the voltage of any signal at rate of the LFO to produce classic sample-and-hold effects. This circuit also has a second output which is a smoothed version of the stepwise output.