OCP (SMD) Build guide (v1.0), 04/07/2022
VOR / NON VOR:
Before installing the firmware
it’s time to choose about VOR.
VOR = V
ariable
O
utputs
R
ange.
VOR is a unique feature of Plum Audio versions for Ornament and Crime.
Other versions (Non Plum Audio) of Ornament and Crime modules can only offer output range
of 9 volts peak to peak (vpp) and single offset from -3v to 6v.
To change this offset, physical resistors at the circuit board should be replaced with different
values followed by long calibration process.
This range is a compromise for most o_C applications
, it is not good enough for envelopes
which needs a peek of 8v-10v to completely open a VCA and it's not good enough for a LFO's
which needs a -/+5v (Bi-Polar) range for its operation.
Plum Audio versions (Like the OCP module you just built) comes with VOR option, when
you are using VOR you get:
-
extended range of 10 volts peak to peak (vpp).
-
option to set the offset to: Bi-Polar (+/-5v), Uni-Polar (0v to 10v) or Asymmetric (-3v to
7v).
-
Auto select of VOR offset when opening new app (In official firmware only):
Envelopes
– Uni Polar
LFO’s – Bi-polar
Sequencers and Quantizers
– Asymmetric.
VOR required a special circuit on the module followed by VOR supported firmware and different
calibration process.
To activate VOR in hardware level
– Move the VOR SELECT jumper on the back to VOR
position.
VOR supported firmware can be download from Plum Audio website:
https://www.plum-audio.com/oc-firmware
The combination of official firmware with VOR is highly recommended, if you want to
work with other firmware we recommend disabling VOR due to the lack of VOR support
for other firmwares.
Notes:
-
When VOR is disabled - The VOR button on the front panel does nothing ...
-
When switching from VOR to NON VOR or vise versa recalibration is required.
-
VOR supported Hemisphere is available but there is a bug in the calibration app, if you
planning to use this combination first calibrate your module using Official firmware (VOR
Supported) and switch to VOR Supported Hemisphere after the calibration is complete.
