WORKING CONDITION: Very Good. This unit performed as it should under testing with a vintage Korg K-700 synthesizer.

Please Note: This unit requires a 220VAC to 120VAC step-down transformer to operate in the United States.

PHYSICAL CONDITION: Excellent. The metal case, knobs, and iO jacks are all in excellent condition. There are no dents or blemishes in the chassis. 

INVENTORY #59330

BRAND: Korg

MODEL: MS-03 Signal Processor 

FUNCTION: Synthesizer Signal Processor 

PRODUCT DESCRIPTION: This listing is for a Korg MS-03 Control Voltage Signal Processor 220V AC. The Korg MS-03 Control Voltage Signal Processor is a rare, specialized vintage pitch-to-voltage utility box introduced by Korg in 1979. It is designed to track a monophonic audio signal (such as an electric guitar, voice, or saxophone) and convert it into control voltage (CV) and trigger/gate signals. This allows virtually any external musical instrument or microphone to "play" a monophonic analog synthesizer.

SPECS:

• Serial # 180961
• Pitch-to-CV Conversion: The unit analyzes the fundamental pitch of an incoming 1/4" monophonic audio signal and generates a corresponding pitch control voltage.
• Dual-Standard Compatibility: Unlike many vintage interfaces restricted to one format, the MS-03 uniquely outputs both major analog pitch standards:
  • Hz/V (Hertz per Volt): The standard used by vintage Korg (e.g., MS-10, MS-20) and Yamaha synthesizers.
  • V/Oct (Volts per Octave): The linear standard utilized by Moog, ARP, Roland, and modern Eurorack modular systems.
• Envelope Follower: It extracts the amplitude curve (volume) of the audio input and outputs it as an envelope control voltage, allowing you to control parameters like synthesizer filter cutoff or VCA dynamics just by playing harder or softer. 
• Dual Gate Outputs: To match the diverse triggering formats of various synth manufacturers, it offers both S-Trig (Short/Ground-to-High) and V-Trig (Voltage Trigger) formats.
• Tracking and Sensitivity Controls: Features dedicated Input Sensitivity and Trigger Level knobs to clean up the incoming signal, along with a "Mode" selector offering 3 levels of tracking response to minimize glitching. 
• V/Oct Calibration: Includes fine-tuning and "Width" adjustments specifically for the Volts-per-Octave output, ensuring precise scale tracking across multiple octaves when driving external synths. 
• Performance Inputs: Equipped with a footswitch input to control performance functions like Portamento or Pitch Hold.

ACCESSORIES INCLUDED: This item comes as seen in photos and does not include any accessories.

UNPACKAGED WEIGHT: 6 lbs.

UNPACKAGED DIMENSIONS: 11" x 4" x 8"