Korg MS Series - Voltage Controlled Switching

YouTube via Newueel — May 16, 2010 — "A demo using a voltage controlled switch, built on a MS-50 + SQ-10, accompanied by 2 MS-20's.

The voltage controlled switch allows you to switch between two signals instantly. The control signal determines which one of the input signals is taken. The function is very generic and can be used for switching control signals as also for switching audio signals. The switch has two inputs, one output and a control input. The control input voltage should be only 0V or +5V (no values in between). When 0V the first input signal is passed, when +5V the second input signal is passed.

The function is built of 2 VCA's, 2 Analog mixers(/adding amplifiers), an inverter and a +5V signal. Because of the required analog mixers, this function can only be built using an MS-50 and an SQ-10.

In this video the SWITCH function is used for switching between two trigger signals for the volume envelope of the kick drum part (MS-50 EG 1). One trigger signal sends a trigger each step, the other trigger signal sends a trigger only each 1st, 5th, 9th and 13th step. The switch is controlled (manually) by the MS-50 TRIGGER SWITCH. The most left blinking LED on the MS-50 indicates the function result. Note that the speed of the blinking changes when the trigger switch (MS-50 most right knob) is pressed. Note also that the MS-50 envelopes are sometimes 'disabled' for a while by increasing the attack or delay time, which basically mutes the associated sound, because the envelopes are re-triggered too fast to pass any sound."