OSCILLATOR SECTION

• Four Waveforms are available, although only one at a time: Triangle, Ramp (descending), Pulse and Noise.
• Like the MS-50 (but unlike the MS-20, interestingly enough) the MS-10 features pulse width modulation (they all offer initial pulse width control, though, which can be swept manually, like this). The PW/PWM pot controls pulse width when nothing is plugged into the PWM input. When there is an input, however, it reverts to controlling the level of the input--in other words, there is no "initial pulse width" control when there is PWM.
• Pulse width modulation--MG triangle wave output, patched to PWM input.
• Pulse width FM--MS-50 VCO (square wave, audio range, 4') patched to PWM input as PWM knob is swept.
• The top pot in the Frequency Modulation section controls the level of Oscillator Frequency Modulation from the Modulation Generator (LFO), but only the triangle/ramp wave output of the MG. To modulate the oscillator with the MG's square wave, the patch panel must be used. The bottom controls FM level from the Envelope Generator, until something is plugged into the "FREQ" input.

• VCO frequency modulation with ramp (asc) LFO--MG adjusted to ASCENDING ramp wave.
• VCO frequency modulation with ramp (dsc) LFO--MG adjusted to DESCENDING ramp wave.
• VCO frequency modulation with square LFO--MG square wave output patched to VCO "Freq" input as EXT level control is swept.
• VCO frequency modulation with another VCO (true FM)--MS-50 8' square wave output patched to VCO "Freq" input as EXT level control is swept.

Note that the "Freq" input is a Volt/Oct (exponential) input, while the VCO CV input is Hertz/Vlt (linear). Why is this important? Most synthesizers operate on the 1 Volt per Octave (exponential) standard of controlling pitch with voltage (if C1 is 1 volt, than C2 is 2 volts, etc.). Korg operates on a linear standard, so controlling an MS-10 with a Roland, Moog or Arp synthesizer, or a standard MIDI to CV device is more difficult than simply connecting the CV out of the exponential device to the CV input of the MS-10. It can be done, however, by connecting the CV out of the exponential device to the VCO "Freq" input, then adjusting the EXT knob in the frequency modulation section until proper tuning is achieved. (Converting triggers is another matter, though. More on that later.)

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