OCP (SMD) Build guide (v1.0), 04/07/2022
CALIBRATION:
Before you can use your new OCP it is very important to calibrate it -
The calibration lets you fine-tune the CV outputs and inputs as well to adjust some basic
settings.
The calibration procedure of the OCP is similar to any other Ornament and Crime version but
when using VOR there are few more steps.
In this document I will review the calibration of OCP with VOR firmware in highlights.
To read about the calibration procedure in depth please refer to the Ornament and Crime
manual
To enter to the calibration mode push down and hold the left encoder during startup.
1. Encoder directions:
With the encoders supplied with the kit, the left encoder will be in reverse direction, to fix
it
– press twice on the “up” button (the button bellow the left encoder).
2. Use default values:
Yes! It is a new module that has never been calibrated before…
3. Correct display offset:
With the OLED provided there should be no offset problems, you can skip to the next
step.
4. CV Outputs:
In the following 40 steps you will calibrate the CV outputs from the farthest left out (A) to
the farthest right out (D).
There are 10 calibration points for each output - 0v to 10v.
5. VOR:
The next 2 steps are used to calibrate the 2 extra offset modes of the cv outputs (VOR),
first step is for the bi-polar mode and second for the asymmetrical mode.
In both steps you need to calibrate to the closest you can get to 0v. Since VOR system
is using the internal DAC of the Teensy (less accurate then the main DAC) precision of
+/-0.0015v is fine.
6. CV Inputs:
To calibrate the CV Inputs 0v first turn all attenuverter knobs fully clockwise and insert
patch cable to each cv input you calibrate.
Leave the other end unconnected.
to calibrate CV in 1 to 1v and 3v, connect the other end to one of the outputs.
7. Screensaver timeout period:
Here you can set the timeout period before the screensaver is activated.
The default value is 25 seconds, if you preferer longer or shorter times you can configure
it now.
Save? Yes!!!
