 This allows the LFO to modulate the pulse width (which is called pulse width modulation, or PWM) of the VCO or the amplitude of the VCA.It also has a noise generator with white and pink noise outputs, CV in and out, and an external signal input (not to be confused with the "External Signal Processor" of the MS-20).The MS-10's VCO uses linear voltage control (Hz/Volt) but note that oct/V scaling (−5V to +5V) is available via judicious use of the "freq" CV input socket.