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MDIDBOX CV with Korg MS-10


the operator
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I would like to build a midibox CV in order to control my MS-10 with MIDI sequencer (1st step -> CV / Trig / Cutoff Freq.)  ;D. I meet some difficulties to understand MS-10 specifications from http://www.korganalogue.net/korgms/manuals/ms10/m1001.html#specs which drive AOUT module design :

*  VCO control voltage input (linear response) / 0V ~ +8V   ??? 

*  External cut-off frequency control input (2OCT / V) / -5V ~ +5V   ???

*  External trigger input /  gnd.bmp  ???  What does it mean?

What is the max output voltage, 8 V? R_x, R_y and R_sigma should be respectivly 10kohm, 2,2kohm and 800 ohm?

Does it work as follow?

table.gif

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Hi.

Which is more important - that You understand this jargon or that controlling MS-10 works?

*  VCO control voltage input (linear response) / 0V ~ +8V   ??? 

= Midibox CV Hz/V option. TK has used Korg MS-50 to realize this.

*  External cut-off frequency control input (2OCT / V) / -5V ~ +5V   ???

= This is funny one ;)  V/oct. scaled down (to 0,5V/Oct) + Balanced CV extension

*  External trigger input /  gnd.bmp  ???  What does it mean?

= Switched trigger, S-trig whatever. Using reversed gate polarity should work.

Uh, and build the Midibox CV by following orders on the site and worry about scaling max voltages ect. later.

Moebius

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