via this Reverb listing
"Features and Specifications:Input: 1/4" Input
Input Sensitivity: 3 volts peak-to-peak maximum
Portamento: Minimum to maximum travel time
Output: CV Out Hertz/Volt Analog Pitch Control (0 ~ +8V)
Output: CV Out Octave/Volt Analog Pitch Control (+1 ~ +5V)
Output: Trigger High to Ground
Output: Trigger Ground to High (+15v)
Modes: 3 Levels of Tracking Response
Range: High and Low range of operation
Output: Envelope Control Voltage
Dimensions: 283 mm (W) x 195 mm (D) x 110 mm (H)
Weight: 2.4 kg, 4W
In the late nineteen seventies, Korg was apparently determined to open the world of synthesizers to more than just keyboard players.
Introduced in 1979 just a year after the classic MS-10 and MS-20 the MS-03 converts incoming audio signals into a range of control voltage signals. The MS-03 can drive just about any monophonic analog synthesizer, with outputs that support both the Moog/Arp/Eurorack standard of one volt per octave, and the less common Korg/Yamaha standard of hertz to volts. The unit also has two different types of gate outputs.
For users of the Moog/Arp/Eurorack standard there is a tuning and width control. The tune control is used to "tune" the MS-20 to the attached synth, and the "width" control adjust the precise range of one octave.
Korg MS-20: The circuitry of the MS-03 is similar to the Pitch to Voltage circuit in the Korg MS-20, but a comparison of the two converters shows the MS-03 is faster and more accurate than the MS-20.
Korg MS-03: The MS-03 has many of the same controls as found on the Korg X911 Guitar Synthesizer without the synthesizer components. Features found on both units include footswitch-operated Portamento, Synthesizer "Hold" and "Cancel" functions.
[Condition]
This MS-03 is in perfect working condition and in Very Good condition.
This unit was checked by professional technician.
with box and foot pedal, paper work(copy)"
