Korg MS-20 Sound Randomizer

This patch makes the MS-20 randomize its sound, each time the momentary switch is pressed. This can be very useful if you're looking for sounds to sample. It may come with really nice surprises.

This is how it basically works:
The pink noise generator is generating the random input signal for the S&H module. The S&H module is clocked by the reversed output of EG1. Each time the momentary switch is pressed, EG1 is triggered and the S&H module holds the current (random) input signal and sends it to Total Ext. From there the signal modulates the pitch, high pass and low pass filters. The amount of modulation for each part is still controlled by the three different frequency modulation knobs (T.EXT) on the control panel.

If you're wondering why EG1 is used to clock the S&H, here is why. If the momentary switch would be patched directly to the S&H clock input, you would have to keep the switch pressed to keep the current sample.
To reverse this behavior the momentary switch triggers EG1. Now by using EG1 to clock the S&H, the sample changes while the switch is pressed and holds after releasing the switch. Note that all EG1 knobs have to be set to 0.

Below an example for knob settings and patches (also some pictures available):

KNOBS:
VCO1: [Square] [(middle)] [32']
VCO2: (not used)
PORTAMENTO: [2]
VCOMIX: [10] [0] [ 0] [ 0]
HPF: [ 5] [ 6] [ 9] [ 6]
LPF: [ 6] [ 7] [ 9] [ 0]
MG: (not used)
EG1: [0] [0] [0]
EG2: [0] [0] [5] [6] [2]
ESP: (not used)

PATCHES:
1. NOISE GENERATOR (PINK) -- SAMPLE & HOLD (IN)
2. MOMENTARY SWITCH -- ENVELOPE GENERATOR 1 (TRIGGER)
3. ENVELOPE GENERATOR 1 (REVERSED OUT) -- SAMPLE & HOLD (CLOCK)
4. SAMPLE & HOLD (OUT) -- VOLTAGE CONTOLLED OSCILLATOR 1+2 (TOTAL)

Optional:
5. CONTROL WHEEL -- VOLTAGE CONTROLLED HP FILTER (CUTOFF FREQ)

Category:

Music

Tags:

• korg
• ms20
• ms-20
• space
• sound
• randomizer
• patch
• sample&hold
• sample
• hold
• momentary
• switch

[moribund14]

would like to see a detail of the patch panel

[mynmyself]

can the patchbay be used in conjunction with other modular gear? o cv based gear?

[Dsil303]

Leuk truukje! Thanks. Alleen klopt je patch setting niet helemaal, want je moet de gewone EG1 uit gebruiken ipv de reversed EG1

[thrcman]

the coolest synth ever made in every way.

[Papadepapo]

AWESOME