The Midimuso CV-12 ORAC kit
This kit can be built for less than £20.00
You just need to order 3 items: the IC, the PCB and the parts – see the Shop page.
MIDI to CV converter using the Moog Volts / Octave CV scheme.
This board can produce
1V / octave or 1.2V / octave or 0.5V / octave just by setting the trimmer.
The Midimuso CV-12 Octex (fully assembled)
It’s just like the ORAC but has 8 sockets on board which can be patched by the user.
LEDs show signal sources and destinations
The IC which makes it all happen….
How does it work?
The CV-12 IC translates MIDI into gates and control voltages.
MIDI is fed in at pin #2 and the IC produces 18 separate voltage outputs which can be used in new designs or retro-fitted to a synthesiser.
The outputs include:
Control-Voltages (max 11)
Aftertouch (channel pressure)
Auxiliary Gates (max 11)
Midi Clock (CT)
Here’s the CV 12 Manual
Socket boards are now available for this board allowing easy connection of 3.5mm jacks (compatible with the Octex too) – see the shop page.
Here are the CV-12 PCB Instructions
Here is the manual for the NEW CV-12 Octex board
And the .mid files for easy program changes for both boards: